They are called: The Lymph nodes, spleen, and the thymus glands are collectively.
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Answer:
Non-zero digits are always significant. Any zeros between two non-zero digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant.
Explanation:
Answer:
The water vascular system of echinoderms functions in locomotion and feeding.
Explanation:
The water vascular system of echinoderms is responsible for the functions in locomotion and feeding. The water vascular system is a hydraulic system that is used by echinoderms for example sea stars and sea urchins, for the purpose of locomotion (movement), food and waste transportation, and respiration. This system is composed of canals connecting numerous tube feet.
There are two hormones that the adrenal medulla is responsible for secreting, and those are:
1. epinephrine, also known as adrenaline
2. norepinephrine, or noradrenaline