The skeletal system: Appendicular Skeleton
TeachMeAandP・2 minutes read
The appendicular skeleton comprises the arms, legs, pectoral girdle, and pelvic girdle, with specific bones like the clavicle and scapula forming crucial joints. Detailed descriptions of bone structures in the upper and lower limbs demonstrate the complexity and intricate articulations present in the human appendicular skeleton.
Insights
- The appendicular skeleton comprises the arms, legs, pectoral girdle, and pelvic girdle, highlighting the crucial role of these structures in supporting movement and providing attachment points for muscles.
- The detailed anatomy of the upper and lower limbs, including bones like the clavicle, scapula, humerus, ulna, radius, femur, tibia, fibula, and various carpal, metacarpal, tarsal, and metatarsal bones, underscores the complexity and precision required for effective limb function and mobility.
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Recent questions
What bones make up the shoulder joint?
Clavicle and scapula form the shoulder joint.
What are the parts of the humerus bone?
The humerus bone has a head, deltoid tuberosity, capitulum, and trochlea.
What are the main bones of the forearm?
Ulna and radius are the main forearm bones.
What are the components of the femur bone?
The femur bone consists of the head, neck, trochanters, and condyles.
What are the bones of the ankle and foot?
The ankle and foot bones include tarsal bones, metatarsals, and phalanges.
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Summary
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Appendicular Skeleton: Arms, Legs, Girdles, Joints
- The appendicular skeleton includes the arms, legs, pectoral girdle, and pelvic girdle.
- The bones of the pectoral girdle are the clavicle and scapula, forming the shoulder joint.
- The clavicle has a sternal end and an acromial end, meeting the sternum and acromion respectively.
- The scapula has the acromion process, coracoid process, glenoid cavity, and spine.
- The scapula has lateral and medial borders, with the glenoid cavity indicating the lateral side.
- The humerus has a head, deltoid tuberosity, and processes for articulation with the forearm bones.
- The humerus has the capitulum and trochlea for articulation with the forearm bones.
- The ulna and radius are the forearm bones, with the ulna having a u-shaped top and the radius a circular top.
- The ulna has the olecranon, coronoid process, trochlear notch, and radial notch for articulation.
- The carpal bones, metacarpals, and phalanges form the wrist and fingers, with three phalanges on each finger except the thumb.
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Bones of the Lower Body: An Overview
- The femur, the largest bone in the body, consists of distinct parts including the head, neck, trochanters, and condyles, with the medial and lateral condyles articulating with the tibia forming the knee joint.
- The tibia, the larger bone in the lower leg, features medial and lateral condyles at the top, with the medial malleolus at the bottom, while the fibula, a smaller bone, is situated on the outer part of the leg and has a head and lateral malleolus.
- The ankle and foot bones include the tarsal bones, specifically the talus and calcaneus, followed by metatarsals and phalanges, with the big toe having only two phalanges compared to the three in the other toes.
