Bones muscles

bones and muscles worksheet answers

These growth plates are easy to spot on an X-ray. Bones store calcium and release some into the bloodstream when it's needed by other parts of the body. The skull protects the brain and forms the shape of the face. For the legs, superficial muscles are shown in the anterior view while the posterior view shows both superficial and deep muscles.

Questions on bones and muscles for grade 2

Bones provide support for our bodies and help form our shape. Smooth muscle sits in and around blood vessels and organs. White blood cells help the body fight infection. Bursa may also be formed by a synovial membrane that extends outside of the joint capsule. The motor cortex on the right side of the brain controls the muscles on the left side of the body and vice versa. It looks like ivory and is extremely strong. The bones of kids and young teens are smaller than those of adults and contain "growing zones" called growth plates. Because girls mature at an earlier age than boys, their growth plates change into hard bone at an earlier age. Bones are made up of a framework of a protein called , with a mineral called calcium phosphate that makes the framework hard and strong. The heart is made of special muscle called cardiac muscle. We can't consciously control our smooth muscles; rather, they're controlled by the nervous system automatically which is why they're also called involuntary. Skeletal muscles vary in their speeds of contraction. Ball-and-socket joints allow the greatest freedom of movement.

Three kinds of freely movable joints play a big part in voluntary movement: Hinge joints allow movement in one direction, as seen in the knees and elbows. The flexor contracts to bend a limb at a joint.

when you move your bones, joints, and muscles work together; this is called?

The ribs form a cage that shelters the heart, lungs, liver, and spleen, and the pelvis helps protect the bladder, intestines, and in girls, the reproductive organs. Depolarization of the motor neuron results in neurotransmitters being released from the nerve terminal. The involuntary muscles are controlled by structures deep within the brain and the upper part of the spinal cord called the brain stem.

How do bones muscles and joints work together to move the body

It is made up of the bones of the skeleton, muscles, cartilage, tendons, ligaments, joints, and other connective tissue that supports and binds tissues and organs together. Ball-and-socket joints allow the greatest freedom of movement. Muscles are like rubber bands, they can bend, stretch and get shorter. The hips and shoulders have this type of joint, in which the round end of a long bone fits into the hollow of another bone. These plates consist of multiplying cartilage cells that grow in length, and then change into hard, mineralized bone. Holes and channels run through it, carrying blood vessels and nerves. In this soft bone is where most of the body's blood cells are made. The motor cortex on the right side of the brain controls the muscles on the left side of the body and vice versa. Joints are classified by their range of movement: Immovable, or fibrous, joints don't move. The bone marrow contains stem cells, which produce the body's red blood cells and platelets, and some types of white blood cells. As adults get older their bones; become weaker. How Do Muscles Work?

We can't consciously control our smooth muscles; rather, they're controlled by the nervous system automatically which is why they're also called involuntary. Then the biceps relaxes and the triceps contracts to straighten the elbow.

Bones and muscles for grade 2

It contracts to make your heart beat. Bones are made up of two types of material — compact bone and cancellous bone. Bones provide support for our bodies and help form our shape. Pivot joints allow a rotating or twisting motion, like that of the head moving from side to side. The human body has more than muscles. You have fibrous joints in your skull. This is where bone marrow is found. In this soft bone is where most of the body's blood cells are made.

Sensors in the muscles and joints send messages back through peripheral nerves to tell the cerebellum and other parts of the brain where and how the arm or leg is moving and what position it's in. Osteoclasts are very active in kids and teens, working on bone as it is remodeled during growth.

Bones muscles

Muscles can pull bones, but they can't push them back to the original position. When we smile and talk, muscles help us communicate, and when we exercise, they help us stay physically fit and healthy. They make the skeleton flexible — without them, movement would be impossible. Joints are where two bones meet. When you bend at your elbow, the biceps contracts. Ossification is when the cartilage is replaced by hard deposits of calcium phosphate and stretchy collagen, the two main components of bone. When your brain tells a muscle to contract, it shortens, pulling one bone towards another across a joint. When you decide to move, the motor cortex sends an electrical signal through the spinal cord and peripheral nerves to the muscles, causing them to contract.

Bones also protect the body's organs.

Rated 8/10 based on 15 review
Download
Bones, Muscles, and Joints