Summaring of unit 5, 6 and 7. by Dierick Sànchez

Endocrine System

diericksanbarreto — 2024-04-21 17:39:12 UTC

The endocrine system is a network of glands and organs that produce hormones, chemical messengers that travel through the bloodstream to regulate various bodily functions. It acts like a complex communication system, coordinating many processes in the body, including growth and development, metabolism, mood, sexual function, and reproduction.

The major glands of the endocrine system include:

diericksanbarreto — 2024-04-21 17:48:42 UTC

Pituitary gland: Often referred to as the "master gland," it produces several hormones that control other endocrine glands.
- Pituitary gland: A pea-sized gland located at the base of the brain that produces several hormones that regulate various body functions.

Thyroid gland

diericksanbarreto — 2024-04-21 17:50:14 UTC

Located in the neck, it secretes thyroid hormones that regulate metabolism and energy balance.

Thyroid gland: A butterfly-shaped gland located in the front of the neck that produces thyroid hormones.

Parathyroid glands

diericksanbarreto — 2024-04-21 17:51:36 UTC

Situated behind the thyroid gland, they produce parathyroid hormone (PTH), which helps regulate calcium levels in the blood. Four tiny glands located behind the thyroid gland that produce parathyroid hormone (PTH).

Adrenal glands

diericksanbarreto — 2024-04-21 17:54:30 UTC

Located on top of the kidneys, they produce several hormones, including cortisol (stress hormone) and adrenaline (epinephrine). Two triangular glands located on top of the kidneys that produce several hormones, including cortisol and adrenaline.

Pancreas

diericksanbarreto — 2024-04-21 17:55:28 UTC

Located behind the stomach, it produces insulin and glucagon, essential hormones for regulating blood sugar levels. A gland located behind the stomach that produces digestive enzymes and hormones, including insulin and glucagon.

Reproductive System

diericksanbarreto — 2024-04-21 18:02:01 UTC

The reproductive system is a collection of organs and a network of hormone production that work together for the purpose of procreation, or creating offspring. It's present in both males and females, and each has distinct parts that collaborate in the process of reproduction.

Male Reproductive System

diericksanbarreto — 2024-04-21 18:03:36 UTC

Testes: Two oval-shaped glands located in the scrotum that produce sperm (male reproductive cells) and testosterone (the primary male sex hormone).
- Sperm: Microscopic male reproductive cells that can fertilize an egg.
- Testosterone: A hormone responsible for development of male physical traits like facial hair and muscle mass, as well as sperm production.
Scrotum: The sac of skin that holds the testes outside the abdomen.
Epididymis: A coiled tube located on the top of each testis where sperm mature and are stored.
Vas deferens: A long, thin tube that carries mature sperm from the epididymis to the ejaculatory duct.
Ejaculatory ducts: Two tubes that join the vas deferens and seminal vesicles to form a single canal that empties sperm into the urethra.
Seminal vesicles: Two sac-like glands that produce seminal fluid, a nutrient-rich fluid that nourishes and protects sperm during ejaculation.
Prostate gland: A gland located below the bladder that produces a milky fluid that contributes to semen.
Urethra: A tube that carries urine from the bladder and semen from the seminal vesicles and prostate gland out of the body through the penis.
Penis: The male reproductive organ used for sexual intercourse and urination.

Female Reproductive System

diericksanbarreto — 2024-04-21 18:05:35 UTC

Ovaries: Two almond-shaped glands located in the lower abdomen that produce eggs (ova) and female sex hormones (estrogen and progesterone).
- Egg (ovum): The female reproductive cell that can be fertilized by sperm.
- Estrogen: A hormone responsible for development of female sexual characteristics like breasts and regulates the menstrual cycle.
- Progesterone: A hormone that prepares the uterus for pregnancy and maintains the lining during pregnancy.
Fallopian tubes: Two tubes that connect the ovaries to the uterus. They are the site where fertilization (the union of sperm and egg) typically occurs.
Uterus: A hollow, pear-shaped muscular organ where a fertilized egg implants and develops into a fetus during pregnancy.
Cervix: The lower, narrow part of the uterus that opens into the vagina.
Vagina: A muscular canal that leads from the cervix to the outside of the body. It serves as the passage for menstrual flow, sexual intercourse, and childbirth.
Vulva: The external part of the female genitalia, including the mons pubis (the fatty mound covered with pubic hair), labia majora (outer lips), labia minora (inner lips), clitoris (a small, erectile tissue), and vestibule (the opening to the vagina and urethra).

Urinary System

diericksanbarreto — 2024-04-21 18:08:00 UTC

The urinary system is your body's filtration system, constantly working to remove waste products and excess water from your blood. It's like a complex plumbing network with each part playing a vital role in keeping your body clean and functioning properly

The urinary system's key components

diericksanbarreto — 2024-04-21 18:10:29 UTC

Kidneys: Two bean-shaped organs located near your lower back, responsible for filtering waste products and excess water from your blood.
- Waste products: Byproducts of cellular metabolism that need to be eliminated from the body.
- Excess water: Extra fluid in the body that isn't required for immediate functions.
Ureters: Two thin tubes that carry urine, the filtered liquid waste, from the kidneys to the bladder.
- Urine: A liquid waste product containing water, urea (a waste product from protein breakdown), and other dissolved salts and minerals.
Bladder: A muscular sac-like organ in your lower abdomen that stores urine until you release it through urination.
Urethra: A tube that carries urine from the bladder out of the body through the process of urination.

Function of the Urinary System

diericksanbarreto — 2024-04-21 18:13:09 UTC

Filtration: The kidneys act as filtration units, constantly processing blood. They remove waste products like urea, excess water, and other unwanted substances.
Waste Removal: The filtered waste products and excess water are combined to form urine.
Storage: Urine travels down the ureters and fills the bladder, which acts as a storage tank.
Elimination: When the bladder reaches a certain fullness, muscles in the bladder wall contract, and the sphincter (muscular valve) at the urethra relaxes, allowing you to urinate and expel urine from the body.