reproductive systems!!!

Male Reproductive System

  • Overview

    • Facilitates male reproductive functions including gamete (sperm) production, transport, and delivery.

  • Key Components:

    • Testes: Produce sperm and testosterone.

    • Epididymis: Coiled tube where sperm mature and are stored for 2-4 days.

    • Vas Deferens: Transports sperm from the epididymis to the urethra.

    • Scrotum: Pouch that houses the testes, maintaining a cooler temperature for sperm development.

    • Penis: External organ that delivers sperm to the female reproductive system. Contains erectile tissue that engorges with blood during an erection.

    • Cowper's Gland: Neutralizes acidic urine and produces pre-ejaculatory fluid.

    • Prostate Gland: Secretes fluid that nourishes and transports sperm.

    • Seminal Vesicles: Produce a sugary fluid (fructose) that provides energy for sperm.

  • Functions of Male Reproductive Parts:

    • Vas Deferens: Receives sperm from the epididymis.

    • Scrotum: Houses and protects the testes while regulating temperature.

    • Testes: Site of sperm production.

    • Semen: Fluid containing sperm and fluids from seminal vesicles, prostate, and Cowper's glands.

Female Reproductive System

  • Overview

    • Facilitates reproduction through egg production, nourishment, and hormone regulation.

  • Key Components:

    • Ovaries: Produce eggs (ova) and hormones (estrogen and progesterone).

    • Fallopian Tubes: Transport eggs from the ovaries to the uterus; site of fertilization.

    • Uterus: Muscular organ where a fertilized egg implants and develops.

    • Cervix: Connects the uterus to the vagina, allows passage for sperm and menstrual fluid.

    • Vagina: Birth canal and passage for sperm during intercourse.

    • Vulva: External female genitalia including labia and clitoris.

  • Functions of Female Reproductive Parts:

    • Ovaries: Release eggs and hormones; regulated by FSH and LH from the pituitary gland.

    • Uterus: Houses fertilized egg and develops embryo into a fetus; sheds lining during menstruation if no fertilization occurs.

    • Fallopian Tubes: Carry eggs and are the site of fertilization.

Hormonal Regulation

  • Pituitary Gland:

    • Produces Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH), regulating reproductive functions in both males and females.

  • Hormones in Males:

    • Testosterone: Develops male secondary sexual characteristics and stimulates sperm production.

  • Hormones in Females:

    • Estrogen and Progesterone: Control menstrual cycle, ovulation, and pregnancy maintenance.

Menstrual Cycle Overview

  • Phases:

    • Follicular Phase (Days 1-13): Egg maturation and endometrium thickening.

    • Ovulation (Day 14): Release of a mature egg from the ovary.

    • Luteal Phase (Days 15-28): Corpus luteum forms and maintains endometrium for potential pregnancy.

  • Menstruation: Shedding of the uterine lining if no fertilization occurs.

Fertilization and Early Development

  • Sperm travels through the female reproductive system to fertilize the egg in the fallopian tube.

  • Once fertilized, the egg (zygote) travels to the uterus and implants in the endometrium, developing into an embryo.