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Questions and Answers
What is the shape of the Patella bone?
What is the shape of the Patella bone?
Which bone is located at the top of the skull?
Which bone is located at the top of the skull?
How many flat bones are in the human body?
How many flat bones are in the human body?
What is the name of the bone located at the front of the chest?
What is the name of the bone located at the front of the chest?
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How many irregular bones are in the human body?
How many irregular bones are in the human body?
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Which bone is located between the ribs?
Which bone is located between the ribs?
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What is the total number of flat and irregular bones?
What is the total number of flat and irregular bones?
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Which bone is located at the back of the body?
Which bone is located at the back of the body?
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What is the function of the Ribs?
What is the function of the Ribs?
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What is the total number of bones mentioned in the text?
What is the total number of bones mentioned in the text?
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Study Notes
Overview of the Skeleton
- The adult human skeleton consists of 206 bones, while infants have around 270 bones.
- The skeleton can be divided into two main parts: the axial skeleton (80 bones) and the appendicular skeleton (126 bones).
Axial Skeleton
- The axial skeleton includes the skull, vertebrae, sternum, and ribs.
- The skull is made up of 8 bones: cranium, face, and auditory ossicles (maleus, incus, and stapes).
- The hyoid bone is also part of the axial skeleton.
- There are 26 vertebrae, including the sacrum and coccyx.
- The sternum consists of 1 bone.
Appendicular Skeleton
- The appendicular skeleton includes the shoulder girdles, upper and lower extremities.
- The shoulder girdles consist of 2 clavicles and 2 scapulae.
- The upper extremities include the humerus, radius, ulna, carpals, metacarpals, and phalanges.
- The pelvis (hip bone) is part of the appendicular skeleton.
- The lower extremities include the femur, patella, fibula, tibia, tarsals, metatarsals, and phalanges.
Classification of Bones
- Bones can be classified into four categories: long, short, irregular, and sesamoid bones.
- Long bones have two ends and one shaft, and are found in the limbs.
- Short bones are cube-shaped and are found in the wrists and ankles.
- Irregular bones have complex shapes and are found in the skull and vertebrae.
- Sesamoid bones are small and found in tendons, such as the patella.
Bone Characteristics
- The skull cap is a flat bone that develops from membrane.
- The mandible is an irregular bone that develops mainly from membrane.
- Ribs are flat bones that develop from cartilage.
- The sacrum and vertebrae are irregular bones that develop from cartilage.
Bone Shapes and Development
- The scapula is a flat bone that develops from membrane.
- The clavicle is a long bone that develops from membrane.
- The humerus is a long bone that develops from cartilage.
- The radius and ulna are long bones that develop from cartilage.
- The pelvis (hip bone) is an irregular bone that develops from cartilage.
- The femur is a long bone that develops from cartilage.
- The tibia and fibula are long bones that develop from cartilage.
Articulations
- The upper limb has several articulations: shoulder joint, radio-ulnar joints, elbow joint, and wrist joint.
- The lower limb has several articulations: hip joint, knee joint, and ankle joint.
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Description
This quiz covers the different regions of the human skeleton, including the axial and appendicular skeleton, and the number of bones in each region.
