Blood vessels are muscular tubes that carry blood, sugar, and oxygen to the parts of the body. Nervous impulses cause these tubes to expand or contract. Which system do the vessels belong to? Group of answer choices

circulatory

nervous

digestive

muscular

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.

i am sorry but i need more information and a picture.