What is THE major difference between a Protist and a Porifera? cellularity
way of obtaining energy
having a cell wall
type of cell

the answer is golgi apparatus

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

answer; the code in musculoskeletal system subsection is associated with deep tissue possibly to the bone;