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Ans 2. On a human body, dorsal refers to the back portion of the body.

Ans 3. On a human body, ventral refers to the front part of the body.

Ans 4. Anterior is the front of a structure, or a structure found toward the front of the body.

Ans 5. Situated at or toward the hind part of the body.

Ans 6. the upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.

Ans 7.It separates the outer ear from the middle ear. When sound waves reach the tympanic membrane they cause it to vibrate. The vibrations are then transferred to the tiny bones in the middle ear. The middle ear bones then transfer the vibrating signals to the inner ear.

b. heterotroph

explanation: