LECTURE TOPIC:

ENDOCRINE SYSTEM.

ENDOCRINE SYSTEM

it is a system of INTERNAL SECRETING GLANDS.

Their secretions are called HORMONES.

Hormones are biologically active substances,

responsible for function of different organs

1). CENTRAL GLANDS:

- Hypothalamus

- Pituitary G

- Pineal gland

2) PERIPHERAL GLANDS:

-Thyroid

-Parathyroid

-Adrenal

-Gonads

-Pancreas

-Thymus.

HYPOTHALAMUS

Located in the brain just below the thalamus

Functions as part of both the nervous system and

the endocrine system

Hypothalamus

PituitaryGland

Pinealgland

PITUITARY GLAND

Located in the brain at the end of the stalk from

the hypothalamus.

POSTERIOR PITUTARY

• The posterior pituitary gland secretes two hormones

that are produced in the hypothalamus.

Antidiuretic hormone (ADH)

Oxytocin

PINEAL GLAND

Located between the two lobes of the thalamus

THYROID GLAND

An irregularly shaped gland that has two lobes connected

by a thin bridge in between (the isthmus)

Located in the neck on either side of the trachea and

across its anterior surface

PARATHYROID GLANDS

Four tiny glands

Located on the posterior surface of the

thyroid gland, two on each lobe

THYMUS GLAND

A pink gland with two lobes located in the thoracic cavity

posterior to the sternum

Large during childhood and puberty but shrinks during

adulthood

PANCREAS

Located posterior to the stomach

In C – like duodenum

ADRENAL GLANDS

Paired, triangular glands over the superior end of each

kidney.

Each gland has an outer layer (cortex) and an inner layer

(medulla).

Each layer functions independently of the other and

secretes its own hormones.

OVARIES

Small, egg-shaped glands located in the pelvic cavity

Function as part of both the female reproductive

system and the endocrine system

TESTES

Male genital glands, located outside the body in

the scrotum

thank you for attention.

THE END!