The Point in the Sky Directly Above an Observer's Head

question 54

Short Answer

The point in the sky directly above an observer's head is called the ______________.

---

Definitions:

Bursae

Small fluid-filled sacs located between bones and soft tissues, acting as cushions to reduce friction and allow free movement.

Synovial Membrane

A specialized connective tissue that lines the inner surface of capsules of synovial joints and tendon sheath, producing synovial fluid for lubrication.

Air

The invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.

Blood Vessels

Cylindrical formations responsible for transporting blood all over the body, encompassing arteries, veins, and capillaries.