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Reproduction

 

Table of Content


What is Reproduction?

Reproduction is the natural procedure by which new "posterity" singular life forms are created from their "parents". It is a key component of all known Life.

There are two sorts of reproduction: Asexual and Sexual.

Asexual Reproduction

It includes mitotic division of cells, delivering a group of hereditarily indistinguishable organisms called a Clone. Fungi, Bacteria, and potatoes can recreate asexually.

Asexual Reproduction

Sexual Reproduction

Sexual Reproduction includes the creation of hereditarily diverse gametes by meiosis. A male gamete treats a female gamete, creating a zygote which is hereditarily not the same as its parents.

Sexual Reproduction


For more readings on “Reproduction in Organisms”, please Click Here...

 

Sexual Reproduction in Flowering Plants

The parts of the plant are separated into two fundamental areas, the root and the shoot. The root is involved with every one of the structures beneath the soil, and the shoot is made out of the structures above. Incorporated into the shoot of seed plants are the stem, the leaves, and the seeds. Furthermore, angiosperms contain flowers as a major aspect of their shoots. Each of these structures is crucial in various approaches to the plants presence.

The seed, which creates from an ovule after fertilization has happened, encompasses the plant incipient organism and shields it from parching. Every seed comprises of a developing life, nourishment source, and defensive external coat, and can lie lethargic or dormant for quite a while before growing. Angiosperm seeds (the seeds of blossoming plants) are contained in defensive ovaries (that later get to be a fruit), which shield the seeds from drying out and help in their dispersal.

The plant roots work in the nutrient storage, the securing of water and minerals (from soil), and the tying down of the plant (anchoring) to the substrate. Distinctive plants have various types of roots, running from a taproot (dicots) to a stringy root framework (monocots) to extrinsic or adventitious roots (vines). Small root hairs, which reach out from the root surface, furnish the plant with a gigantic aggregate absorptive surface and are in charge of the vast majority of the plant's water and mineral supply.

Plant stems (or trunks, as they are brought in trees) work principally to transport supplements and give physical support. Transport is accomplished through the vascular framework (made out of xylem and phloem), which conveys water, minerals, and the results of photosynthesis everywhere throughout the plant body. The tissues inside the stems of monocots and dicots are masterminded in an unexpected way, with discrete vascular packages in monocots and ceaseless rings of vascular tissue in numerous dicots.

Process of pollination and fertilization in a flower

Process of pollination and fertilization in a flower

The leaves of the plant contain chlorophyll and are the significant destinations of photosynthesis. As a result of this imperative capacity, leaves are the site of gas trade in plants, and little pores (stomata) on the surface of the leaf permit carbon dioxide in and oxygen (a side effect of photosynthesis) out into the encompassing air. These stomata are managed by guard cells, which open and close contingent upon the accessibility of dampness in nature and shield the plant from losing an excess of water from vanishing (a wonder called transpiration).

Flowers contain the regenerative organs of angiosperms. Every flower is made out of four whorls, each of which contains one of the primary structures of the flower. The calyx contains the sepals and the corolla contains the petals; together, the calyx and corolla involve the perianth, or non-conceptive segment of the flower. The androecium contains the stamens. Stamens, the male regenerative organs, each contain an anther (pollen creation site) and filament. The gynoecium, at the exceptionally focal point of the blossom, contains the pistils (once in a while called the carpels), the female conceptive organs. Every pistil is comprised of a stigma, style, and ovary.

For more readings on “Sexual Reproduction in Flowering Plants”, please Click Here...
 

Human Reproduction

All together for a creature to prevent itself from termination, it ought to divide through reproduction. Similarly as on account of plants where there must be male and female gametes, so it is on account of creatures. Actually, sexual proliferation in plants and creatures are fundamentally the same. For the gametes (male and female sex cell) to be framed, meiosis needs to happen.

It would be ideal if you Note:

  • That the male gamete is dependably the one that moves toward the female gamete.

  • Additionally, of significance is the way that the female gamete is regularly bigger than the male gamete.


Meiosis I

Meiosis I  Meisosi II


Male Reproductive System

The diagram here presents the male reproductive system.

Diagrammatic sectional view of male pelvis showing reproductive system

Diagrammatic sectional view of male pelvis showing reproductive system

Diagrammatic view of male reproductive system

Diagrammatic view of male reproductive system

  • Penis –  Deposits sperm inside the vagina; furthermore disposes of urine.

  • Urethra – Conveys sperm and urine to the penis where they are discharged.

  • Bladder – Stores urine.

  • Seminal Vesicle – Produces semen.

  • Epididymis – Stores sperm.

  • Prostate Gland – Produces semen.

  • Vas Deferens (sperm duct) – Works in transporting sperm to the urethra.

  • Scrotum – contains the testicles. It might likewise be alluded to as the sac.

  • Testis – One of two testicles is responsible for creating male sex cells (spermatozoa).

 

Female Reproductive System

In people, similar to the case with well evolved creatures, the female carries the growing baby inside.

  • Fallopian Tubes (oviducts) – Channels the egg down to the uterus. Fertilization happens here.

  • Uterus – Ensures and supports the creating child. The uterus is lined by endometrium.

  • Ovary – Creates and discharges a develop egg every month.

  • Cervix – Ring of muscles that nearby the lower end of the uterus.

  • Vagina – Gathers sperm deposited by the penis, act as birth channel for a child and is the path for month to month streaming of blood.

Female reproductive system

Female reproductive system


Menstrual Cycle and Pregnancy

It is the conceptive cycle of primates like humans, apes and monkeys. These primates are dynamic reproductively throughout their reproductive phase. Consequently, these are termed continuous breeders. Changes in hormone levels make this cycle possible. The two hormones included are estrogen and progesterone. 

Take note of: the menstrual cycle is not an indistinguishable thing from monthly cycle. Period is a part of the menstrual cycle.

A typical 28 days cycle

A typical 28 days cycle
 

Menstruation is the period amid which the lining of the uterus was shed alongside an unfertilized egg. 

Ovulation – The arrival of a develop egg from one of the ovaries month to month. 

Menstruation frequently starts once a female starts to experience pubescence. It just takes after that ovulation would likewise start from this point. Without ovulation, fertilization cannot take place. Despite the fact that the menstrual cycle appears to start with monthly cycle, a female may get to be pregnant without discharging and even before menstrual cycle starts. The fusion of female and male sex cells takes place by fertilization
 

Estrogen and Progesterone

The levels of estrogen are most astounding around the season of ovulation as it readies the body for the arrival of an egg. It likewise keeps up the lining of the uterus. Progesterone additionally readies the body for conceivable pregnancy. This implies these two hormones are most reduced amid menstruation. 

Different hormones required in the menstrual cycle are: 

- FSH (Follicle Stimulating Hormone) 

- LH (Leutenizing Hormone)

- GnRH (Gonadotrophin Releasing Hormone) 

- Testosterone 
 

Pregnancy

When pregnancy happens, there will be an interruption in the menstrual cycle. This is on account of the lining of the uterus that would not be shed as it is required for padding the developing embryo.

Fetal Growth From 8 to 40 weeks

Amid pregnancy, the creating embryo is encompassed by a sac known as the placenta. Appended to the placenta and the creating child is the umbilical cord. The placenta is in charge of providing the infant with oxygen and supplements by means of the umbilical cord. The child is additionally encompassed by amniotic fluid which assists with support and insurance of the embryo. It is this liquid that is discharged just before a woman starts giving birth. The placenta then turns out after the baby is born and is alluded to as the fetal membrane. 

Embryo – Initial eight weeks after the development of a zygote. 

Fetus – Developing child after the initial eight weeks of conception. 

For more readings on “Human Reproduction”, please Click Here...

 

Reproductive Health

Reproductive health is a condition of overall physical, mental and social prosperity, and not just the nonattendance of reproductive disease or ailment. Reproductive health manages the reproductive procedures, capacities, and framework at all phases of life.

It covers two probable aspects as follows:

  • Population Explosion and Birth control measures

  • Sexually Transmitted Diseases and Treating Infertility

For more readings on “Reproductive Health”, please Click Here...


Reproductive Health: Population Explosion and Birth control measures

The term Birth Control (contraception) is very clear as crystal. It includes ways by which people attempt to manage the event of pregnancy. There are natural and manufactured methods for contraception.

Characteristic strategies for contraception include:

  • Rhythm Strategy - Sex is restricted to the 'safe period' of the menstrual cycle.

  • Withdrawal Technique - No discharge happens in the vagina amid sex.

Simulated techniques for contraception include:

  • Condom - Elastic sheath set on the erect penis or inside the vagina before sex.

  • IUD (Intra-Uterine Device) - T-formed gadget set inside the uterus to avert implantation (connection of the egg to the uterus divider) of a prepared egg.

  • Contraceptive Pill - Pills taken every day to avert ovulation. These pills regularly contain some measure of hormones.

  • Diaphragm (Cervical Cap) - Elastic molded vault set over the cervix to keep sperm from entering the uterus. It is best utilized with spermicidal cream which slaughters sperm.

  • Sterilization - This is an exceptionally perpetual system. In males, it includes the cutting and tying of the vas deferens and is called Vasectomy. In females, it is the place the oviducts are cut and tied or blazed and is called Tubal Ligation.

For more readings on “Population Explosion and Birth control measures”, please Click Here...

 

Reproductive Health: Sexually Transmitted Diseases and Treating Infertility

Sexually transmitted diseases are infections or diseases transmitted to healthy females or males because of sex with contaminated people.

The sexually transmitted diseases are also called Reproductive Tract Infections (RTI) or Veneral Diseases (VD).

Most basic STDs are gonorrhea, syphilis, genital herpes, chlamydiasis, genital warts, trichomoniasis, hepatitis-B and AIDs. With the exception of HIV infections, hepatitis B and genital herpes, different STDs are totally treatable if distinguished early and treated legitimately. Infections like hepatitis-B and HIV are transmitted sexually as well as by sharing of infusion needles to tainted people, blood transfusion or from contaminated mother to baby.
 

Side Effects:
 

Men

  • Swelling or delicacy in genital region.
  • Blisters, wounds or knocks around the mouth or genitals.
  • Fever, chills and pains.
  • Unusual tingling.
  • Burning sensation when you move your bowels or pass urine.
  • Yellow, watery, or white discharge from the penis.

Women

  • Have fewer manifestations than men, regularly none by any stretch of the imagination. Sexually transmitted diseases can prompt to cancer. Women ought to look for 
  • Bleeding that is not a portion of their period.
  • Pelvic or vaginal torment.
  • Discharge from the vagina.
  • Urination that is painful.
  • Unusual rash, sore or development in the genital territory.

Counteractive Action

Under the conceptive medicinal services programs, anticipation, early recognition and cure of STDs are given importance. In spite of the fact that all people are prone to these infections, their rates are accounted for to be high among people in the age gathering of 15 to 24 years.
 

Infertility

Infertility is the point at which a couple becomes unsuccessful to conceive following one year of sexual existence without contraception. 80% of all women coveting youngsters conceive inside 1 year of marriage and another 10% inside the second year.

Assisted Reproductive Technologies (ART) are special techniques that assist couples to have children.
 

Various Types of Assisted Reproductive Technologies (Art) Include:

  • In-vitro Fertilisation (IVF)

  • Zygote Intra Fallopian Transfer (ZIFT)

  • Intra Cytoplasmic Sperm Injection(ICSI)

  • Gamete Intra Fallopian Transfer(GIFT)

  •  Artifical Insemination (AI)
     

Counseling and Information on Infertility

It is mandatory to educate both partners in all aspects of management.

For more readings on “Sexually Transmitted Diseases and Treating Infertility”, please Click Here...


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