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Function: is made up of glands called endocrine glands that secretes a chemical substance called hormones into the bloodstream in which it regulates the activities of other organs and glands in the body.

The pituitary gland is called the master gland located at the base of the brain, behind the eyes
The anterior pituitary lobe secretes:
• Growth hormone (GH)
• Thyroid-stimulating hormone (TSH)
• Adrenocorticotropic hormone (ACTH)
• Hormones that regulate growth, development, and function of the male and female reproductive systems

The posterior pituitary lobe secretes:
• Antidiuretic hormone (ADH)
• Oxytocin

The thyroid gland is in the neck, in front of the larynx.
- Secretes thyroid hormone (T3 -thyroxine, T4 - triiodothyronine) and calcitonin

There are four parathyroid glands:
- Two lie on each side of the thyroid gland.
- The parathyroid glands secrete parathormone.

There are two adrenal glands:
- One adrenal gland is on the top of each kidney.
- The adrenal medulla secretes epinephrine and norepinephrine.
- The adrenal cortex secretes three groups of hormones needed for life:
a. Glucocorticoids
b. Mineralocorticoids
c. Small amounts of male and female sex hormones

The pancreas secretes insulin.
The gonads are the glands of human reproduction:
-  Male sex glands (testes) secrete testosterone.
-  Female sex glands (ovaries) secrete estrogen and progesterone.

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Nervous System - Get to know our nervous system a bit closer, how does it works? | Neurology

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The circulatory system is made up of the cardiovascular system consisting of the heart and blood vessels and the lymphatic system consisting of lymph, lymph nodes, and lymph vessels.

Two types of fluids
*Blood - the heart, and blood vessels form the cardiovascular system.
*Lymph - Lymph nodes, and lymph vessels form the lymphatic system.

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How does your immune system work? - Emma Bryce

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Respiratory System - Brings oxygen into the lungs and eliminates carbon dioxide.

Respiration - inhalation and exhalation.

Upper respiratory track and lower respiratory track.

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Function: It results from the union of a male sex cell and a female sex cell. While, the differences in the male and female reproductive system, it allows the process of reproduction

Male Reproductive System
- Male sex glands are called testicles or gonads.
- Testosterone is a male hormone is produced in the testes.
- Sperm travel from each testis to the epididymis.
- The prostate gland lies below bladder and secrete fluid into the semen- increases the mobility of sperm.
- The penis contains erectile tissue.

Female Reproductive System
- The external female genitalia are called the vulva.
a. The mons pubis is a rounded, fatty pad over a bone called the symphysis pubis.
b. The labia majora and labia minora are two folds of tissue on each side of the vaginal opening.
c. The clitoris is a small organ composed of erectile tissue.
- It becomes hard when sexually stimulated.
- The mammary glands (breasts) secrete milk after childbirth.

Menstruation
If pregnancy does not occur, the endometrium (blood-rich lining of the uterus) breaks up and is discharged from the body through the vagina.

Fertilization
- The uniting of the sperm and ovum into one cell
a.  During intercourse, millions of sperm are deposited into the vagina.      b. If a sperm and an ovum unite in a fallopian tube, fertilization results.
c. The fertilized cell travels down the fallopian tube to the uterus.
d. The fertilized cell implants in the thick endometrium and grows during pregnancy

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Integumentary System: What It Is, Function & Organs - Video for Kids

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The Musculoskeletal System | Educational Videos for Kids

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Digestive System | The Dr. Binocs Show | Learn Videos For Kids

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Biology of the Kidneys and Urinary Tract | Merck Manual Consumer Version