Which cells secrete hormones? A. Tissue cells B. Museles cells C. Respiratory D. Glands

The correct answer is D. Glands.

Glands are specialized cells or organs that produce and secrete substances for the body. These substances can be hormones, enzymes, or other chemicals. Glands can be classified into two types: endocrine glands and exocrine glands.

Endocrine glands secrete hormones directly into the bloodstream.

Hormones are chemical messengers that travel throughout the body and regulate many different body functions, such as growth, metabolism, and reproduction. Examples of endocrine glands include the pituitary gland, thyroid gland, and adrenal glands.

Exocrine glands secrete their substances through ducts onto the surface of the skin or into a body cavity. Examples of exocrine glands include sweat glands, salivary glands, and digestive glands.

Tissue cells, muscle cells, and respiratory cells are not specialized to secrete hormones.