54 Questions
Short bones are roughly shaped like a cube.
True
Short bones are mainly found in your ribs.
False
Curved bones help to attach muscles to our bones.
True
The shoulder bone is an example of a short bone.
False
The main job of curved bones is to protect internal organs.
True
The skull forms a cavity for the liver.
False
The ribs protect internal organs such as the heart and lungs.
True
The spine provides support for the pectoral and pelvic girdles.
True
The skull supports the structures of the face.
True
The spine does not protect any organs.
False
Skeletal muscles are controlled involuntarily.
False
Cardiac muscle is found only in the heart.
True
Flexion occurs when the angle of a joint decreases.
True
There are four types of muscle tissue in the human body.
False
The shoulder flexes when we throw an underarm.
True
The femur is the longest and strongest bone in the human skeleton.
True
The bones that make up the fingers and toes are called metatarsals.
False
The head of the femur articulates with the acetabulum in the pelvic bone.
True
Each of your toes contains three bones.
False
The tarsals and metatarsals form the arches of the foot.
True
The metacarpals in your hands are visible when you make a fist.
True
The largest bone in the body is the femur.
True
Bones are made entirely of hard material.
False
The human skeleton is made up of 206 bones.
True
The skeleton provides a framework for muscles to attach to create movement.
True
There are six bones in each human ear.
False
The skull protects the brain.
True
The human foot contains 26 bones.
True
The image labels the femur as part of the arm.
False
The foot has more than a hundred muscles, tendons, and ligaments.
True
There are 33 joints in the human foot, with 20 of them being actively articulated.
True
The scapula is located in the leg.
False
The traps help move your head and assist the upper back when lifting heavy objects.
True
The shoulders, or delts, allow for overhead lifting and the rotation of your legs.
False
The chest muscles control the movement of the arms, help in pushing open doors, and play a role in inhalation.
True
Biceps are primarily responsible for extending the elbow and counteracting actions performed by the triceps.
False
The triceps contract to straighten the arm and extend the elbow.
True
The forearm allows you to rotate your forearm outward and inward.
True
The quads help in the extension and flexion of the knee and hip.
True
Lats are not involved in any breathing movements.
False
The glutes help in raising your knee to your chest.
True
Calves enable the curling of your toes.
True
Hamstrings do not contribute to the extension of the ankle.
False
The skeleton is made up of bones, joints, and cartilage.
True
The femur is the smallest bone in the human body.
False
A shoulder joint extends when the humerus moves backwards from the rest of the body.
True
There are three bones in each ear that help with hearing.
True
Extension of the hip joint occurs when the femur moves forward.
False
Bones are very heavy, which is why they are strong.
False
The elbow extends when performing a split leap.
False
The long bones in the body include the femur, humerus, and bones of fingers and toes.
True
The human skeleton has 106 bones.
False
The take-off knee extends when a high-jumper takes off.
True
Both knees extend when a high-jumper takes off.
False
Study Notes
The Skeleton System
- The skeleton is the central structure of the body, composed of bones, joints, and cartilage.
- It provides a framework for muscles to attach, giving us our human shape.
- The human skeleton contains 206 bones, with 6 tiny bones in the middle ear that function in hearing.
- The largest bone in the body is the femur (thigh bone).
- Bones are strong but light, with lots of air under the surface, and store minerals needed by the body.
4 Functions of the Skeleton
- Support: Provides a framework to support the organs and tissues of the body.
- Protection: Protects internal organs, such as the brain, heart, lungs, and other viscera.
- Movement: Provides a framework for muscles to attach, allowing for movement through muscle contraction.
- Supply & Storage: A source of red blood cells (transport oxygen) and white blood cells (fight infection) formed within the bone marrow.
Types of Bones
- Long Bones: Longer than they are wide, examples include femur, humerus, and bones of fingers and toes.
- Short Bones: Equal proportions, roughly shaped like a cube, examples include bones of wrists and ankles.
- Curved Bones: Thin and slightly curved, examples include skull, scapula, and ribs.
- Curved bones protect internal organs, attach muscles to bones, and provide stability to joints.
Functions of Important Bones
- Skull: Forms the head, supports face structures, forms a cavity for the brain, and protects the brain from injury.
- Ribs: Protects internal organs, provides support, and aids in respiration.
- Spine: Protects the spinal cord, provides stiffening for the body, and attaches to pectoral and pelvic girdles.
The Human Skeleton
- The legs support and bear the weight of the upper body, and allow for daily activities.
- The bones that make up the fingers and toes are called phalanges.
- The femur is the longest and strongest bone in the human skeleton, and articulates with the acetabulum in the pelvic bone to form the hip joint.
Types of Muscle
- Smooth Muscle: Involuntary, found in internal organs, causes movements within the body.
- Cardiac Muscle: Involuntary, found only in the heart.
- Skeletal Muscle: Voluntary, attached to bones, controls movement.
Types of Movement
- Flexion: Bending a joint, decreasing the angle of the joint.
- Extension: Straightening a joint, increasing the angle of the joint.
Functions of Muscles
- Traps: Allows for head movement, helps with upper back lifting.
- Shoulders: Allows for overhead lifting, arm rotation.
- Chest: Controls arm movement, pushes open doors, aids in inhalation.
- Biceps: Helps with curling motion, flexing the elbow, controls shoulder and elbow.
- Triceps: Contracts to straighten the arm, extends the elbow, counteracts biceps action.
- Lats: Allows for support, sitting up, tilting the pelvis, bending the lower spine, aids in breathing and posture.
- Glutes: Allows for leg movement, prevents knee buckling, aids in squats, climbing stairs, standing, and walking.
- Hamstrings: Allows for knee and hip movement, prevents knee buckling, aids in running, jumping, and squatting.
- Calves: Helps with ankle movement, curling toes, bending the knee.
Learn about the central structure of the human body, comprised of bones, joints, and cartilage, and its functions.
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