Skeletal System

Front

About how many bones does an adult have?

Back

206

Answer explanation

An adult human typically has 206 bones. This number can vary slightly due to variations like extra ribs or bones, but 206 is the standard count for a healthy adult skeleton.

Front

Name this bone.

Back

humerus

Answer explanation

The humerus is the bone of the upper arm, connecting the shoulder to the elbow. The femur is the thigh bone, and the tibia is the shin bone. Therefore, the correct answer is humerus.

Front

Name this bone.

Back

femur

Answer explanation

The femur is the longest bone in the human body, located in the thigh. It connects the hip to the knee, distinguishing it from the radius and tibia, which are located in the arm and lower leg, respectively.

Front

Name this bone.

Back

patella

Answer explanation

The patella, commonly known as the kneecap, is a small bone located in front of the knee joint. It protects the knee and aids in leg movement, distinguishing it from the phalanges (finger bones) and femur (thigh bone).

Front

Name this bone.

Back

tibia

Answer explanation

The tibia, also known as the shinbone, is the larger and stronger of the two bones in the lower leg, located medially. It supports weight and is crucial for walking, making it the correct answer over the fibula and femur.

Front

Name this bone.

Back

radius

Answer explanation

The radius is one of the two long bones in the forearm, located on the thumb side. It is distinct from the ulna, which is on the opposite side. Therefore, the correct answer is radius.

Front

Where is new blood cells created?

Back

In bone marrow, located inside the bone

Answer explanation

New blood cells are created in the bone marrow, which is located inside the bones. This is the primary site for hematopoiesis, the process of blood cell formation, making the correct answer 'In bone marrow, located inside the bone'.

Front

All living things are made up of

Back

cells

Answer explanation

All living things are made up of cells, which are the basic units of life. Tissues, organs, and organ systems are made up of groups of cells, but the fundamental building block is the cell.

Front

2 or more tissues working together are called...

Back

organs

Answer explanation

2 or more tissues working together form an organ. Organs perform specific functions in the body, while cells are the basic units of life, organ systems are groups of organs, and an organism is a complete living entity.

Front

These tissues hold bones together at movable joints.

Back

ligaments

Answer explanation

Ligaments are the connective tissues that hold bones together at movable joints, providing stability and support. Cells, organs, and tendons serve different functions and do not specifically connect bones at joints.