l. choose the letter of the correct answer.
1. it allows you to bend your knees. a. muscles b. joints c. femur d. tendons
2. which set of bones protect the lungs and the heart? a. skull b. ribs c. pelvic bones d. backbones
3. it is a helmet like case that protects the brain? a. backbone b. breastbone c. skull d. ribs
4. which statement is best describing about the bones? a. the bones support the body and protect the internal organs. b. the bone supports the body from falling c. the bones give shape to the body. d. the bones maintain structure.
5. these are muscles that you have the ability to consciously control, like bones in arms, legs and face. a. internal muscles b. voluntary muscles c. external muscles d. involuntary muscles
Answers & Comments
Answer:
1. b.
The knee is a hinge joint, formed where the thighbone and the shinbone meet. Healthy cartilage absorbs stress and allows the knee to bend easily. Muscles power the knee and leg for movement. Tendons attach the muscles to the bones.
2. b.
The ribs form a cage that shelters the heart and lungs, and the pelvis helps protect the bladder, part of the intestines, and in women, the reproductive organs.
3. c.
The skull protects the brain. The skull has evolved features that protect the brain in several ways.
4. a.
Bones provide support for our bodies and help support our entire weight. Bones also protect the body's organs.
5. b.
Skeletal muscles are under our conscious control, which is why they are also known as voluntary muscles.