What part of the digestive system first causes chemical changes to food?
saliva in the mouth
100
Which two body systems are directly involved in movement?
muscular and skeletal
100
In the human body, the circulatory system works with the respiratory system by
transporting oxygen to organs.
100
The production of sweat is typically a response to an increase in the body’s
temperature.
100
what day is today
jajjajajjajajaj well done easy right
200
What is the primary job of red blood cells?
transport oxygen
200
Eating food that is undercooked can lead to a disease that affects the digestive system. Which body part is directly affected by the disease?
intestines
200
Which organ is the site of gas exchange between the body and the environment?
lungs
200
While collecting wildflowers, a student begins to sneeze and has itchy, watery eyes. What bodily system causes this reaction?
immune
200
the second name of your favorite Sciences teacher
alex
300
What is the primary function of white blood cells in humans?
fight disease
300
Which system absorbs and carries food from the digestive system to the rest of the body?
circulatory system
300
Which organ system is responsible for the exchange of oxygen and carbon dioxide between the body and the environment?
respiratory
300
How do muscles and bones work together to create body movement?
The muscles pull on the bones.
300
The job of the bladder in an animal is to store wastes. Which organ in an animal removes wastes from the blood?
kidney
400
Some runners ate pasta before a race. The pasta was broken down into simple sugars and was absorbed by the blood stream. What body system was responsible for breaking down the pasta into small nutrients for use in the cells of the runners?
the digestive system
400
Plants have special tissues that transport food, water, and minerals throughout the plant. What are these tissues similar to in animals?
arteries and veins
400
Which of the following is a function of the digestive system of the human body?
breaking down food into nutrients
400
Isabel goes jogging for two miles on a sunny afternoon. At the end of her run, she is warmer. As Isabel jogs, which function does the skin perform to help stabilize her body temperature?
Her skin discharges water.
400
kidney is most responsible for filtering which substance from the blood?
wastes that form urine
500
The circulatory system is composed of blood vessels that travel from the heart to the rest of the body and back to the heart. Why does blood make a complete loop throughout the body?
to carry nutrients throughout the body and remove wastes
500
Roger visited his grandfather who lives on a farm. While he was there, he helped his grandfather move hay out of the barn. As Roger worked in the barn he began sneezing. Which system of the body most likely caused Roger to sneeze?
immune
500
nematode and a rabbit both have a digestive system. Their systems are compared in the diagram shown. who require more energy to operate?
The rabbit requires more energy and nutrients than the nematode.
500
Why does the brain of mammals keep track of the temperature of the skin and the blood?
to maintain a stable body temperature regardless of air temperature
500
Roger visited his grandfather who lives on a farm. While he was there, he helped his grandfather move hay out of the barn. As Roger worked in the barn he began sneezing. Which system of the body most likely caused Roger to sneeze?