Which of the following organisms has a closed circulatory system?
a. sponges
b. cnidarians
c. nematodes
d. insects
e. vertebrates

The correct answer is E. Vertebrates have a closed circulatory system.

Explanation:

The main mission of the circulatory system is to deliver oxygen and nutrients to all body cells.

In the closed circulatory system, blood travels inside a network of blood vessels, without leaving them. The material transported by the blood reaches the tissues through diffusion. It is characteristic of all vertebrates, including humans.

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

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.