Bones Joints and Muscles
The skeleton is a tough, flexible framework for the rest of your body. It also has other functions. It stores (1)______such as calcium and phosphorus. It makes red blood cells, platelets, and some (2)______blood cells in the bone marrow. It also forms a system of levers with muscles attached. This enables the body to move. It also protects internal (3)______.
(4)______hold the bones to each other, (5)______attach muscle to bone. A muscle pulls one of the bones, which moves the joint. The (6)______fluid lubricates and nourishes the tissues in the joint capsule. The synovial (7)______lines the joint capsule and secretes synovial fluid. The (8)______is a smooth protective surface which protects ther ends of the bones.
Muscles cannot push, the can only pull. The muscles (9)______to pull. They only stretch when another muscle pulls. The arm is bent when the (10)______muscles contract, and the (11)______muscles stretch. When the arm straightens the (12)______contract and the (13)______muscles stretch.
The upper arm has a bone called the (14)______. The lower arm has two bones. The upper bone is called the (15)______, and the lower one is called the (16)______. The upper bone in the leg is called the (17)______, and the lower bones of the leg are called the tibia and (18)______.
Weight-bearing activities such as jogging stimulate bone growth. Inactivity can maker bones much less dense and (19)______.
Some athletes take muscle building supplements which are banned. Many of the banned substances are (20)______. These can have serious health effects on the body, and have an unfair (21)______over other athletes in competions.
advantage biceps biceps cartilage contract femur fibula humerus Ligaments membrane minerals organs radius steroids synovial Tendons triceps triceps ulna weaker white
------Key------
Bones Joints and Muscles
The skeleton is a tough, flexible framework for the rest of your body. It also has other functions. It stores minerals such as calcium and phosphorus. It makes red blood cells, platelets, and some white blood cells in the bone marrow. It also forms a system of levers with muscles attached. This enables the body to move. It also protects internal organs.
Ligaments hold the bones to each other, Tendons attach muscle to bone. A muscle pulls one of the bones, which moves the joint. The synovial fluid lubricates and nourishes the tissues in the joint capsule. The synovial membrane lines the joint capsule and secretes synovial fluid. The cartilage is a smooth protective surface which protects ther ends of the bones.
Muscles cannot push, the can only pull. The muscles contract to pull. They only stretch when another muscle pulls. The arm is bent when the biceps muscles contract, and the triceps muscles stretch. When the arm straightens the triceps contract and the biceps muscles stretch.
The upper arm has a bone called the humerus. The lower arm has two bones. The upper bone is called the radius, and the lower one is called the ulna. The upper bone in the leg is called the femur, and the lower bones of the leg are called the tibia and fibula.
Weight-bearing activities such as jogging stimulate bone growth. Inactivity can maker bones much less dense and weaker.
Some athletes take muscle building supplements which are banned. Many of the banned substances are steroids. These can have serious health effects on the body, and have an unfair advantage over other athletes in competions.