Girls begin their growth spurt around age 10, while boys begin their growth spurt around age 12.
The basic components of a mature mammary gland are thealveoli<span> (hollow cavities, a few millimeters large) lined with milk-secreting cuboidal cells and surrounded by myoepithelial cells. These </span>alveoli<span> join to form groups known as </span>lobules. Eachlobule<span> has a lactiferous duct that drains into openings in the</span>nipple<span>.
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Griffith learned that a chemical changed harmless cells into harmful cells.
Answer:
Double circulation and coronary circulation
Explanation:
land vertebrates developing a new way to take blood from the heart to the heart and a double circulation
Answer:
It is the Central nervous system and the Peripheral nervous system
Explanation:
The central is made up of the brain and spinal cord. The peripheral is made up of nerves that branch off from the spinal cord and extend to all parts of the body
