Endocrine Organs

This gland sits on top of the kidneys and releases hormones involved in long-term stress responses.

Adrenal Cortex

This gland sits on top of the kidneys and releases hormones responsible for the fight-or-flight response.

Adrenal Medulla

This gland is composed of four tiny glands embedded on the posterior surface of the thyroid.

Parathyroid Glands

This endocrine organ exists only during pregnancy.

Placenta

This gland is often called the "master gland" because it controls many other endocrine organs.

Hypothalamus or pituitary gland

This gland wraps around the trachea and resembles a butterfly.

Thyroid gland

This gland shrinks with age and is most active during childhood.

Thymus gland

This gland helps regulate blood sugar through two opposing hormones.

Pancreas

Small pea-sized gland located deep within the brain, attached to the hypothalamus by a stalk.

Pituitary Gland

Tiny gland located near the center of the brain, posterior to the thalamus.

Pineal gland

Butterfly-shaped gland wrapped around the front of the trachea in the neck.

Thyroid Gland

Four small, pea-sized glands attached to the posterior surface of the thyroid gland.

Parathyroid Glands

Bilobed gland located in the upper chest behind the sternum and above the heart.

Thymus gland

Elongated organ running horizontally behind the stomach.

Pancreas

Small triangular structures sitting on top of each kidney.

Adrenal glands

Outer layer of the adrenal gland shown surrounding the inner region.

Adrenal cortex

Inner portion of the adrenal gland shown in the center.

Adrenal medulla

Female reproductive organs located on either side of the uterus.

Ovaries

Male reproductive glands located within the scrotum.

Testes

Temporary organ attached to the uterine wall during pregnancy and connected to the fetus by the umbilical cord.

Placenta

You see a gland with two lobes connected by a thin bridge (isthmus) in the neck.

Thyroid gland