Foramen: Allows blood vessels and nerves to travel through bone.
Fossa: Allows to bones to form a joint.
Explanation:
Tubercle is a small round prominence on the bone which helps in the attachment of tendons to the bones.
Foramen means aperture or hole, through which blood vessels and nerves can pass through. For example: Vertebral foramen. Vertebral foramen of all the vertebral bones together form the vertebral canal. Blood vessels pass through the vertebral foramen. Another example is foramen magnum in the occipital bone.
Fossa is small depression on the surface of bone where articulation can occur. Example: radial fossa- is a depression which articulated with head of radius when the forearm is raised. Olecranon fossa receives olecranon of ulna when forearm is extended.
through examples like decomposition, spoiling of food, diseases etc. we cant see any of them but they are all taking place as we can see them in our day to day life. i think this is it. tell me if i was able to help you. sorry if it was not helpful.
It's not cilia because cilia found in nearly all the cells in the body. It's not mitochondria; those are found in liver cells and others. It's not lysosomes because those function as the digestive system in the cell. That means the answer is flagella Sperm are the only human cells to have flagella.