Circulatory & Respiratory Systems
This muscular organ pumps blood throughout your body.
What is the heart?
This J-shaped muscular organ performs mechanical digestion by churning food and chemical digestion using pepsin and hydrochloric acid.
What is the stomach?
$100: This large organ is the main control center of the central nervous system, processing information and directing all body activities.
What is the brain?
This type of tissue attaches your skeletal muscles directly to your bones so you can pull and move them.
What is a tendon?
I protect your internal organs, give your body its shape, store minerals like calcium, and work with your muscles to help you move. Who am I?
What is the skeletal system?
These blood vessels carry oxygen-rich blood away from the heart.
What are arteries?
This 20-foot-long organ is where most chemical digestion takes place and where almost all nutrients are absorbed into the bloodstream.
What is the small intestine?
The endocrine system relies on these specific chemical messengers, produced by glands, to regulate long-term processes like growth, mood, and metabolism.
What are hormones?
This type of muscle tissue is found only in the walls of your heart and pumps blood automatically without you thinking about it.
What is cardiac muscle?
I use organs like the stomach and intestines to break down the food you eat into tiny nutrients that your cells can use for energy. Who am I?
What is the digestive system?
This dome-shaped muscle beneath the lungs contracts to help you inhale.
What is the diaphragm?
These two bean-shaped organs in the excretory system constantly filter urea, excess water, and cellular waste out of your blood to create urine.
What are the kidneys?
These organs in the endocrine system are responsible for creating and releasing chemical messages directly into the blood.
What are glands?
This soft, flexible tissue is found inside the center of your largest bones and is responsible for making new blood cells.
What is bone marrow?
I use your heart, blood, and blood vessels to transport oxygen, nutrients, and waste products all around your body. Who am I?
What is the circulatory/cardiovascular system?
These tiny air sacs in the lungs handle gas exchange?
What are alveoli?
This large accessory organ produces bile to break down fats, and it also filters dangerous toxins out of your blood.
What is the liver?
This organ belongs to both the digestive system and the endocrine system because it releases a hormone called insulin to control your blood sugar levels.
What is the pancreas?
This smooth, flexible connective tissue acts like a shock absorber to cushion the places where two bones meet and prevent them from rubbing together.
What is cartilage?
I am your body’s cleanup crew! I use organs like your kidneys and bladder to filter out cellular waste and extra water so your body stays balanced. Who am I?
What is the excretory system?
These microscopic blood vessels exchange nutrients and gases with body cells
What are capillaries?
These tiny, finger-like projections line the inside of the small intestine, vastly increasing its surface area so nutrients can diffuse into the blood faster.
What are villi?
This specific gland releases a hormone called adrenaline that gives you a sudden burst of energy when you are scared or excited.
What is the adrenal gland?
These are muscles you cannot consciously control, such as the ones that push food through your digestive tract or make your heart beat.
What are involuntary muscles?
I am your body’s fastest communication network. I use electrical signals to let you see, hear, feel pain, and react to the world around you. Who am I?
What is the nervous system?