Human Anatomy and Biology

An adult human ______ weighs between 1,350 and 1,400 grams (3 pounds). This gives humans a large ______-to-bodyweight ratio. But more important is the development of portions of the ______. Certain extremely specialized regions and structures within the ______ account for emotion, thought, reasoning, memory, and even precise, coordinated movement.

Because humans stand and walk on two appendages, our style of locomotion is said to be ______. Upright posture imposes other diagnostic structural features, such as the sigmoid (S-shaped) curvature of the spine, the anatomy of the hips and thighs, and arched feet. Some of these features may cause clinical problems in older individuals.

The human ______ is structurally adapted for tremendous versatility in grasping objects. The saddle joint at the base of the ______ allows a wide range of movement.

Certain of our anatomical ______ are so specialized that they are diagnostic in separating us from other animals, and even from other closely related mammals. We also have ______ that are equally well developed in other animals, but when these function with the human brain, they provide us with remarkable and unique capabilities. Our anatomical ______ include the following:

The adult ______ brain weighs between 1,350 and 1,400 grams (3 pounds). This gives us a large brain-to-bodyweight ratio. But more important is the development of portions of the brain. Certain extremely specialized regions and structures within the brain account for emotion, thought, reasoning, memory, and even precise, coordinated movement.