Answer:
Basically, the Atrioventricular valves are Mitral and Tricuspid valves located between the atrium and ventricles. Their main functions is to “prevent the backflow of blood from the ventricles into the atrium during the ventricular contraction (systole).
Explanation:
The Grand Canyon is made of sedimentary rock that contains fossils up to 1 billion years old. and the several upper layers of rock contain terrestrial, or land-based, fossils, such as dragonfly wing impressions and the footprints of scorpions, centipedes, and reptiles
Answer:
Both muscular and skeletal system work together to make the organisms move from one place to another.
Explanation:
Skeletal system consist of bones which provides shape and supports to the body. It also provides protection to the delicate organs such as brain, lungs and heart etc. Bones are attached with one another with the help of muscles. All the vital organs are also made from muscles. These muscles helps the body to move, run, exercise and other movements and helps in the performance of your body.
