Answer:
organ
Explanation:
The level of organization that the heart would be classified as is organ. The heart is an organ that is made of cardiac tissue, and cardiac tissue
Answer:
Skin is the largest organ and covers a surface area of 20 square feet.
Explanation:
Skin has three layers the epidermis, the dermis and the hypodermis. the epidermis is the outermost layer and provides a water-proof barrier. The dermis contains hair follicles, connective tissue and sweat glands. The hypodermis is the subcutaneous deeper layer made up of connective tissue and fat.
Answer: electrocardiogram
Explanation:
The electrocardiogram measures the rhythm, rate and frequency of beats of the heart.
