The Endocrine system

Glands and hormones

Endocrine system

1. Functions: Producing hormones to help maintain homeostasis

2.Parts of endocrine system: a. Glands that produce hormones

3. Hormones- chemical messengers carried by blood-

a. May stimulate other glands

b. Regulate growth, development, metabolism, sex processes

Major Glands of the Endocrine system

1. Hypothalamus

2. Pituitary

3. Thyroid

4. Parathyroid

5. Adrenal.

6. Pancreas

7. Ovaries

8. Testes

Hypothalamus

1. Part of brain

2. Secretes hormones that stimulate or suppress the release of hormones in the pituitary gland.

Pituitary gland1. Master gland of body

2. Located in base of brain, under hypothalamus

3. Produces many hormones that affect other glands– thyroid stimulating hormone– Somatotropin- growth hormone– Lutenizing (LH)- causes ovulation– ICSH- causes testes to secrete testosterone– Melanocyte stimulating- distribution of melanin in skin– ADH- antidiuretic hormone– Prolactin: stimulates milk production in females

Thyroid Gland

1. In neck - in front of the pharynx (or throat)

2. Produces hormones that control metabolism and calcium in blood.

3. Thyroid gland must have any source of iodine

Parathyroid Glands

1. In neck – behind the

thyroid gland

1. Very small about the size of a grain of rice

2. Controls the amount of calcium in our bones and our blood

Adrenal glands

1. Located just above the kidney

2.Secretes many hormones

3.Major Hormone: Adrenaline

4.Function: Causes the heart rate and breathing to increase

Pancreas1. Located below stomach

2. Major Hormone: Insulin

3. Function: Carries glucose into the cells from the blood stream

4. Also secretes glucagon- increases glucose in bloodstream

Testes (Males)1. Located in scrotum

2. Major Hormone: Testosterone

3. Function: Causes masculine characteristics and the production of sperm

Ovaries (Female)1. Located in lower abdomen

2.Major hormone: Estrogen which causes female characteristics and helps regulate the menstrual cycle

3.Secondary hormone: Progesterone which prepares the uterine lining for an embryo and causes ovulation

Exit slip

1. What does the endocrine system do?

2. List some glands that are in the endocrine system.

3. What (2) parts of the endocrine system are also in the reproductive system?