Unit 7 science

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Questions and Answers

Which of the following bones is NOT part of the pectoral girdle?

  • Scapula
  • Clavicle
  • Humerus (correct)
  • Femur (correct)

The pelvic inlet in females is smaller and heart-shaped compared to males.

False (B)

What is the name of the bony socket where the femur joins the pelvic girdle?

Acetabulum

The ______ is a large, flat bone that forms the shoulder blade.

<p>scapula</p> Signup and view all the answers

Match the following anatomical structures with their corresponding descriptions:

<p>Acromion = A prominent bony projection in the hip bone Glenoid cavity = Socket where the humerus joins the scapula Coracoid process = Inferior to the acromion, where some pectoral muscles attach Greater trochanter = Tip of the shoulder, where the clavicle attaches Operative foramen = A passageway for nerves and muscles in the pelvis</p> Signup and view all the answers

Flashcards

Pectoral Girdle

The structure comprising the clavicle and scapula that supports the shoulder.

Acromion

The tip of the shoulder where the clavicle attaches.

Glenoid Cavity

The socket in the shoulder where the humerus fits.

Pelvic Girdle

The structure formed by the fusion of 3 bones, supporting the hip region.

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Patella

The knee cap that aids the quadriceps muscles, providing strength.

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Study Notes

Pectoral Girdle

  • Composed of the clavicle (collar bone) and scapula (shoulder blade)
  • Clavicle attaches to the sternum (breastbone) and the scapula
  • Acromion: Tip of the shoulder; where the clavicle attaches
  • Glenoid cavity: Socket where the humerus (upper arm bone) joins
  • Coracoid process: Inferior to acromion; where pectoral muscles attach

Pelvic Girdle

  • Results from the fusion of three bones
  • Male pelvis is smaller and heart-shaped
  • Female pelvis is larger and wider
  • Acetabulum: Socket for the head of the femur (thigh bone)
  • Obturator foramen: Opening for nerves and muscles

Lower Limb

  • Femur (thigh bone): Largest and strongest bone in the body
  • Greater trochanter: A prominent projection on the femur
  • Tibia (shin bone): Medial and weight-bearing
  • Fibula: Lateral bone in the lower leg
  • Patella (kneecap): Provides leverage and protects the knee
  • Tarsals (ankle bones), Metatarsals (foot bones), Phalanges (toe bones)
  • Calcaneus (heel bone): Biggest ankle bone (receives half of body weight)
  • Medial and lateral malleolus are projections of the tibia and fibula at the ankle
  • Patella: Protects knee, increases leverage for quadriceps
  • Knee joint is mechanically and structurally advantageous. Quadriceps are 50% stronger

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