Answer:The immune system is a network of cells, tissues and organs that work together to attack pathogens that try to invade your body. Bacteria, parasites and fungi that may cause infection meet a system of immune soldiers, including T-lymphocytes, macrophages and neutrophils.
Explanation:
Answer:
Curl-up Test
Abdominal strength and endurance is measured in curl-up part of the fitnessgram physical fitness test.
Explanation:
The curl-up fitness test is an abdominal fitness test carried out by performing curl-ups using a time range of 1 curl up in 3 seconds, then you make as many curl ups as possible. In the curl-up fitness test, abdominal strength and abdominal endurance are tested and developed, this strength and endurance helps in stabiliizing and supporting the back.
A curl-up is done by laying on your back, with both arms crossed over the chest, then you bend the knees. Then, you start lifting your body and start touching your thighs with the elbow. This tests the strength and muscles of the abdomen.
The answer would be A. If you stretch Before a Activity you will be able to Avoid Pulling a Muscle, Plus Its a Type of a Warm Up.
