PASS 2024 Flashcards
What are the 5 functions of the Skeletal system?
- Framework and Structure for supporting the body
- Facilitating movement
- Protection, especially of vital organs
- Blood cell production
- Store Minerals
Describe how the skeletal system provides framework and structure for supporting the body
The Skeletal system forms the body’s framework, providing essential structure and stability, crucial for maintaining posture, balance and coordination. For example, the large bones of the lower limbs, such as the femur and tibia, bear the body’s weight, which supports the trunk while standing, walking or running.
Describe how the skeletal system facilitates movement.
The skeletal system provides levers and anchors for muscles to pull against. The muscles, connective tissue and bones form a part of a movement relationship, allowing the body to move in controlled and predictable movement patterns; for example running and throwing.
Describe how the skeletal system allows for protection, especially of our vital organs.
Bones of the skeletal system protect vital organs. For example, the ribcage protects the lungs, the sternum protects the heart, the skull protects the brain and the vertebrae protects the spinal cord.
Describe how the skeletal system allows for blood cell production.
Red and White blood cell production occurs within the bone marrow of bones and is created to aid bodily functions. Red blood cells transport oxygen in haemoglobin and important nutrients to our organs and tissues. Red blood cells also carry Co2 back to the lungs for exhalation. White blood cells are important for fighting infection and disease.
Describe how the skeletal system allows for the storing of minerals.
Bones in the skeletal system store essential supplies of minerals, mainly calcium. Calcium maintains bone density and allows blood to clot and muscles to contract. When the body is calcium deficient, it relies on the calcium stored in the bones to replenish levels in the bloodstream. This makes the bones brittle and prone to injury and over time, can lead to osteoporosis.
Name the main bones in the skeletal system: https://www.purposegames.com/game/label-the-skeleton-game
https://www.purposegames.com/game/label-the-skeleton-game
What makes up the skeletal system?
Bones, cartilage, ligaments and tendons.
What are the external functions of the skeletal system
Structure, movement and protection of our vital organs.
How many bones does the adult body have?
206
What are the internal functions of the skeletal system?
Blood cell production and storing of minerals
Outline the role of the Appendicular skeleton
The appendicular skeleton includes 126 bones which make up our upper and lower limbs and include bones such as the humerus, radius, femur and tibia. The main function of the appendicular skeleton is facilitating movement. For example, the femur in the legs works with muscles, joints, the tibia and the fibula to allow for movements such as running and walking. The bones in this part of the skeleton also store and make red and white blood cells as well as other important nutrients in the bone marrow of bones. Similar to the axial skeleton, the appendicular skeleton also provides a framework for our bodies.
Outline the role of the Axial Skeleton
The axial skeleton includes 80 bones divided into the skull, vertebral column, and thoracic cage regions. The axial skeleton is important for the protection of vital organs such as the brain, heart, lungs and spinal cord. This skeleton also provides shape and framework for our body and therefore provides a stable platform for many movements. For example, it supports the head and neck, allowing for movements such as bending, twisting and nodding.
Outline what joints are and their role in the human body
A joint is a place where two or more bones meet. Almost every bone in the body has formed at least one joint with another bone. Joints facilitate movements and allow for stability by increasing compression across the joint surface at the moment of loading.
All joints are put into three categories, what are these categories?
Fixed joints (unmovable) - Synarthrosis
Cartilaginous joints (slightly movable) - Amphiarthroses
Synovial joints (freely movable) - Diarthroses
Explain cartilaginous joints
Cartilaginous joints provide small and limited movement of bones. The most common example is the vertebral column. The vertebral column is the joining of the vertebra through fibrous cartilage, called vertebral discs, in an ‘S’ shape to protect the spinal cord.
Explain fixed joints
Fixed joints are two joints where no movement is possible due to no connective tissue like ligaments and tendons but instead fibrous connective tissue. An example is the bones in the skull, which protect the brain.
Explain synovial joints
Synovial joints allow for maximum movement and help us with day-to-day activities. Examples are the joints in the hips, knees and elbows.
Synovial joints are the most common type of joint in the body and can be classified into 6 types. What are these 6 types?
- Ball and Socket Joint
- Hinge Joint
- Condyloid joint
- Saddle Joint
- Pivot joint
- Gliding Joint
What are the features of all synovial joints?
- A membrane that lines the outside of the joint
- Contain synovial fluid
- Rely on ligaments
- Include cartilage
What movements do the Condyloid joint allow for? And what are some examples of this joint?
Facilitates the movements of flexion, extension, adduction, abduction and circumduction. Examples include the wrist joints.
What movements do the ball and socket joint allow for? And what are some examples of this joint?
Ball and Socket Joints facilitate the movements of flexion, extension, adduction, abduction, rotation and circumduction. Examples of this joint include the hip and shoulder joints.
What movements do the Hinge joint allow for? And what are some examples of this joint?
Facilitates the movements of flexion and extension. Examples include the joints in the elbows, knees and fingers.
What movements do the saddle joint allow for? And what are some examples of this joint?
Facilitates the movements of flexion, extension, adduction, abduction and circumduction. Examples include the joint where the thumb joins the hand.
What movements do the pivot joint allow for? And what are some examples of this joint?
Facilitates the movement of rotation. Examples include the atlas and axis in the neck and the radius and ulna in the forearm.
What movements do the gliding joint allow for? And what are some examples of this joint?
Facilitate a slight sliding movement. Examples include the bones in the wrist and vertebrae.
Outline the function of long bones and an example of this type of bone.
- To be a rigid rod for muscle attachment and to facilitate a wide range of movements.
- Examples include the Femur and Tibia
What are the 5 types of bones
- Long bones
- Short bones
- Flat bones
- Irregular bones
- Sesamoid bones
Outline the function of short bones and an example of this type of bone.
- To facilitate flexibility and support with little movement
- Examples include carpals, tarsals and patella
Outline the function of flat bones and an example of this type of bone.
- To protect vital organs and act as an attachment to muscles
- Examples include the sternum, ribs, clavicle and scapula.
Outline the function of irregular bones and an example of this type of bone.
- To perform different functions including; attachment for muscles, movement, protection of nervous tissue, and maintaining support.
- Examples include the pelvis and vertebrae
What are ligaments?
A fibrous connective tissues that connects bone to bone and keep the stabilised.
Outline the function of sesamoid bones and an example of this type of bone.
- To minimise friction, increase the strength of associated muscles and support tendons from the wear and stress of movement.
- Examples include the patella
What is synovial fluid?
A type of viscous fluid found in the joint capsule of synovial joints. Its function is to absorb shock and reduce friction.
What is the synovial membrane?
The soft-tissue membrane that lines the inner surface of synovial joint capsules and makes synovial fluid.
What are tendons?
A fibrous connective tissue that connects muscle to bones and allows for movement of bone or bone structure and stabilises us.
What is cartilage?
A rubbery substance that prevents bones from rubbing together
What are the three types of muscles in the body?
- Smooth
- Cardiac
- Skeletal
Name the main muscles in the muscular system. https://www.purposegames.com/game/label-the-muscles-game
https://www.purposegames.com/game/label-the-muscles-game
Outline smooth muscles
They are found in the walls of blood vessels and the digestive system. Because these muscles cannot be controlled, they are known as involuntary muscles. They maintain blood pressure/flow and control the involuntary movement of most organs present in the body. For example, smooth muscles in the stomach and intestine aid digestion.
Outline cardiac muscles
These muscles are found only in the heart. These are involuntary muscles that contract and relax causing the heart to beat.
Outline skeletal muscles
This type of muscle is attached to the skeleton and causes movement when they contract and relax. These are known as voluntary muscles. Skeletal muscle cells are long and thin and are called twitch fibres. The most important types of physical activity are fast and slow twitch fibres.
Outline fast twitch fibres
Fats twitch muscle fibres are important for fast and short exercise. For example, an elite-level sprinter would have a higher proportion of fast-twitch muscle fibres.
Outline slow-twitch fibres
Slow twitch muscle fibres are important for long-duration and slow-to-medium-paced physical activity. For example, middle-distance and long-distance runners usually have a greater ratio of slow twitch muscle fibres.
What are the 5 functions of the muscular system?
- Locomotion, Balance and Posture
- Absorption of shock and heat
- Breathing
- Protection of internal organs
- Digestion
Describe how the muscular system provides locomotion, balance and posture.
Skeletal muscles enable voluntary movements, allowing us to walk, run and perform daily activities. Muscles also work to maintain balance and posture, ensuring we can stand upright and move efficiently. For example, the leg muscles such as the quads and hamstring and core muscles such as the external oblique engage during walking to keep the body structure.
Describe how the muscular system absorbs shock and heat
Muscles play a crucial role in absorbing impact during physical activity, helping to protect our joints and bones from injury. Additionally, muscle contractions generate heat - about 85% of our warmth - vital for maintaining body temperature.
Describe how the muscular system allows for breathing
The muscular system is essential for respiration. The diaphragm and intercostal muscles between the ribs, contract to expand the chest cavity, allowing air to flow into the lungs and for efficient breathing.
Describe how the muscular system allows for protection of internal organs
Muscles provide a protective layer for vital organs. For example, the abdominal muscles protect the stomach and intestine and the pectoralis major protects the heart and lungs.
Describe how the muscular system allows for digestion
Smooth muscles in the stomach and intestine involuntarily contract through a process called peristalsis. This allows food to efficiently travel through our bowels and aids digestion and nutrient absorption.
Describe what a flexion movement is and demonstrate an example.
Bending or decreasing the angle at a joint.
Demonstrate example: Extend one arm and bend it up towards the body. Such as doing a bicep curl.
The body is capable of 8 movements. What are these 8 movements?
- Flexion
- Extension
- Adduction
- Abduction
- Dorsiflexion
- Plantar flexion
- Circumduction
- Rotation
How does muscle movement occur by moving joints?
Skeletal muscles are arranged in pairs around joints, allowing for the movement of joints in both directions. For a muscle to move a joint it must span the joint and be attached to the bones on both sides of the joint. Muscles are attached to these bones by tendons. For example, a muscle needs to be attached to the lower and upper arm to bend the elbow.
Describe what an extension movement is and demonstrate an example.
Straightening or increasing the angle at a joint
Demonstrate example: Straightening a bent knee. Such as kicking a soccer ball.
Describe what an abduction movement is and demonstrate an example.
Moving a body part away from the body’s midline
Demonstrate example: Stand straight and then move one leg out to the side. Such as when doing a starjump.
Describe what an adduction movement is and demonstrate an example.
Moving a body part towards the body’s midline
Demonstrate example: Stick on leg out to the side of the body and bring it back together with the other leg. Such as when doing a starjump.
Describe what a dorsiflexion movement is and demonstrate an example.
Moving the toes towards the shin bone
Demonstrate example: Do a hamstring stretch or flex your foot towards you shin
Describe what a plantar flexion movement is and demonstrate an example.
Moving the toes away from the shin bones
Demonstrate example: Point the toes towards the ground
Describe what a circumduction movement is and demonstrate an example.
Moving a joint in a circular motion
Demonstrate example: Rolling arm in circular motion such as bowling in cricket
Describe what a rotation movement is and demonstrate an example.
Turning or twisting a bone along its axis
Demonstrate example: Moving head side to side. Another example is a ballet dancer doing a pirouette.
Outline posture and how your muscles work even when you do not think they are
Even when standing still, your muscles are still working to maintain posture. Postural muscles constantly contract and relax to keep your body balanced. For example, what happens to your head while you’re nodding off to sleep while sitting. Postural muscles are also vital in sports. They stabilise one part of the body while others move. For example, during a push-up, the muscles in the back and abdomen hold your body straight. They also help absorb impact and stabilise your joints.
Outline what the agonist muscle is
The muscle that is causing the movement
Outline what the antagonist muscle is
The muscle relaxes so that movement can occur
NOTE: (Flip)
Muscles are arranged in pairs so that if one muscle
moves a body part in one direction, another can move it
back. Looking at the elbow joint as an example, the
pair of muscles are the biceps and triceps. The biceps
muscle is positioned at the front of the upper arm, and
the triceps muscle is positioned at the back of the
upper arm.
The two muscles work as a pair, so that when the biceps
is contracting to cause the elbow to flex, the triceps
is relaxing. In this example, the bicep is known as the
agonist, or prime mover, and the triceps is known as
the antagonist.
When you extend one knee what is the agonist and antagonist muscle?
Agonist: Quads
Antagonist: Hamstring
When you stand on your toes what is the agonist and antagonist muscle?
Agonist: Gostrocnemius
Antagonist: Tibialis anterior
What are the three types of contraction?
- Isometric contraction
- Isotonic contraction
- Isokinetic contraction
Outline what Isometric contractions are
The muscle develops tension but there is no change in the length of the muscle. For example, pushing up a closed door.
Outline what Isotonic contractions are
The muscle develops tension and there is a change in the length of the muscle. These contractions are either eccentric (muscle lengthens) or concentric (muscle shortens.) For example doing a biceps curl.
Outline what isokinetic contractions are
The muscle changes length while maintaining constant tension throughout the entire movement. This requires special equipment to ensure the tension remains steady across the full range of motion.
What are the three major components of the circulatory system?
- The heart
- Blood
- Blood vessels
What are the 4 chambers of the heart
Right atrium, left atrium, right ventricle and left ventricle
What are the 4 valves in the heart
Tricuspid, mitral, aorta and pulmonary valve.
What are the functions of valves?
Valves ensure blood flows in only one direction by opening and closing tightly, preventing backflow and maintaining efficient circulation throughout the body.
Label the main parts of the heart. https://www.purposegames.com/game/the-heart-quiz
https://www.purposegames.com/game/the-heart-quiz
Describe the flow of blood through the heart beginning with deoxygenated blood.
Begins with deoxygenated blood
1. Deoxygenated blood enters the heart through the superior and inferior vena cava
2. Blood then flows into the right atrium, then the right ventricle and is pumped through the pulmonary artery to the lungs
3. The lungs now oxygenate this blood
Oxygenated blood:
4. Oxygenated blood returns to the heart via the pulmonary vein, entering the left atrium
5. Blood then moves to the left ventricle
6. Finally, the blood is pumped out through the aorta to circulate throughout the body
What are the 3 components of blood?
- Plasma
- White blood cells and platelets
- Red blood cells
What is the functions of Plasma
Carries nutrients, hormones, and proteins to the parts of the body that need it and removes waste from cells.
What is the functions of platelets
Used for blood clotting for example forming scabs to stop bleeding.
What is the function of red blood cells?
Red blood cells transport oxygen in haemoglobin and important nutrients to our organs and tissues. Red blood cells also carry Co2 back to the lungs for exhalation.
What are the three types of blood vessels
- Arteries
- Veins
- Capillaries
What is the function of white blood cells?
Form part of the immune system by identifying and attacking pathogens.
What is the function of blood vessels?
Blood vessels allow blood to be transported throughout the body.
Explain how arteries, veins and capillaries work together to transport blood around the body.
Blood is pumped from the heart through the aorta and travels through the arteries to the body. It then reaches capillaries, the smallest blood vessels, where nutrients are delivered to cells and waste is collected. Veins carry the waste back to the heart where it is sent to the lungs for re-oxygenation