Muscular System
This muscle group in the back of your upper leg helps you bend your knee
What are the hamstrings
This soft tissue inside bones produces blood cells.
What is bone marrow
These blood vessels carry blood away from the heart
What are arteries
This muscle below the lungs helps with breathing by contracting and relaxing
What is the diaphragm
This is the stage of life when a person’s body becomes capable of reproduction
What is puberty
This large muscle in your buttocks helps you stand up from a sitting position.
What is the gluteus maximus
The adult human body has approximately this many bones.
What is 206
The heart has this many chambers
What is four
These tiny air sacs in the lungs are where gas exchange occurs.
What are alveoli
These are the male reproductive cells
What are sperm
This type of muscle is found only in the heart
What is cardiac muscle
These tough tissues connect bones to other bones at joints.
What are ligaments
These blood vessels carry blood back to the heart.
What are veins
This tube, also called the windpipe, carries air from the throat to the lungs
What is the trachea
These organs in females produce eggs and hormones like estrogen
What are the ovaries
This is the strong tissue that connects muscles to bones.
What are tendons
The kneecap, also known as this, is an example of a sesamoid bone.
What is the patella
This largest artery in the body carries blood from the heart to the rest of the body.
What is the aorta
This waste gas is expelled from the body during exhalation
What is carbon dioxide
This hormone, produced primarily in the testes, plays a key role in the development of male secondary sexual characteristics, such as deeper voice and facial hair
What is testosterone
Gastrocnemius is the fancy scientific name for this common muscle used frequently in running
What is the calf
This smooth tissue at the ends of bones reduces friction and acts as a cushion in joints.
What is cartilage
what is 60 bpm-100 bpm
Breathing is controlled automatically by this part of the brain
What is the brainstem
This hormone, produced mainly in the ovaries, is responsible for regulating the menstrual cycle and developing female secondary sexual characteristics.
What is estrogen