Use the drop-down menus to identify the terms described below.

Here are the terms that correspond to the descriptions provided:

1. Endocrine gland - a group of cells that secretes substances into the blood or directly into an organ.

2. Hormone - a substance produced by cells that helps specific groups of cells to perform specific functions.

3. Duct - a channel or tube that conveys a substance.

Use the drop-down menus below to complete the following statement.

The

___system contains glands that secrete hormones into the bloodstream, whereas the___

system secretes substances through ducts.

The endocrine system contains glands that secrete hormones into the bloodstream, whereas the exocrine system secretes substances through ducts.

Use the drop-down menus to determine which system the following structures belong to.

pituitary gland

thyroid gland

salivary glands

Here are the systems to which the following structures belong:

• Pituitary gland: Endocrine system

• Thyroid gland: Endocrine system

• Salivary glands: Exocrine system

Which endocrine gland is indicated by the arrow?

hypothalamus

pituitary gland

thyroid gland

adrenal gland

A human body with endocrine glands are shown. The gland that looks like a butterfly in the neck is indicated by the arrow.

The gland that looks like a butterfly in the neck is the thyroid gland.

A human body with endocrine glands are shown. The glands on the kidneys are indicated by the arrow.

Which endocrine gland is indicated by the arrow?

pineal gland

adrenal gland

hypothalamus

ovary

The glands on the kidneys that are indicated by the arrow are the adrenal glands.

Use the drop-down menus to determine which structures of the endocrine system are described below.

connects the endocrine system to the nervous system

called the “master gland” of the endocrine system

secretes a hormone that regulates sleep cycles

regulates the development and differentiation of T lymphocytes

Here are the structures of the endocrine system corresponding to the given descriptions:

1. Hypothalamus - connects the endocrine system to the nervous system.

2. Pituitary gland - called the “master gland” of the endocrine system.

3. Pineal gland - secretes a hormone that regulates sleep cycles.

4. Thymus gland - regulates the development and differentiation of T lymphocytes.