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What are the 6 major structural differences between the anatomical plan of the upper and lower limbs?
- The Pelvic Girdle is a complete circle while the Pectoral Girdle is not
- The Pelvic Girdle does not support the weight of the body, rather it is the attachment site for many muscles that move the upper limbs. (the collar bone's main function is to keep the shoulder joint away from the midline of the body allowing greater it greater mobility). In contrast, the pelvic girdle receives the weight of the upper body from the axial skeleton, (the spine) and supports it.
- They both employ hinge joints in the middle, "the ginglymus of the upper extremities and the tibiofemoral joints of the lower extremities"
- They both have an interosseous membrane separating them. (This keeps them at a fixed distance from each other. It only allows slight movements between them.)
- The femur has a landmark called the "fovea" through which a tiny ligament connects it to the acetabulum. The humerous does not have this.
- the most commonly fractured bone of the upper extremities is the upper arm, (humerous), while the most commonly fractured bone(s) of the lower extremities is the lower leg (tibia and fibula,) (the crural region).
- lower extremity has a large sesamoid bone called the patella, upper extremities do not.
- the distal ends of the ulna, radius, tibia, and fibula, are called, the styloid processes and the lateral and medial malleolus. These landmarks help to stabilize the condyloid joints of the wrists and ankles.
there's probably more, but this is all I can think of.
What else can I help you with?
What is the differences between the turtle and tortoise limbs?
The difference is that turtle limbs are made for swimming and tortoise limbs are not.
What are the structural difference in a bony fish and a frog?
Bony fish have scales, fins, and gills for respiration, while frogs have smooth skin, limbs for locomotion, and lungs for breathing. Bony fish also have a swim bladder to control buoyancy, whereas frogs do not have this adaptation.
What are two visible differences between forelimbs and hindlimbs?
Depends on the species, but ... 1) hind limbs tend to be sturdier, longer, stronger. 2) the hind limbs are more firmly attached to the spine (via the pelvis) than are the forelimbs.
Which is not a characteristic of the anatomical position?
The anatomical position includes the body standing upright, facing forward, arms at the sides, and palms facing forward. A characteristic that is not part of the anatomical position is having the legs crossed or crossed arms.
What are the structural components of the pectoral and pelvic limbs?
The structural components of the pectoral limbs (forelimbs) include the scapula, humerus, radius, ulna, carpals, metacarpals, and phalanges. In contrast, the pelvic limbs (hindlimbs) consist of the pelvis, femur, tibia, fibula, tarsals, metatarsals, and phalanges. Both limb types feature a combination of bones that provide support, mobility, and dexterity, with the pectoral limbs adapted for grasping and manipulation, while the pelvic limbs are designed for locomotion and weight-bearing. Additionally, both limbs include muscles, tendons, ligaments, and joints that facilitate movement and stability.
What are the 3 major differences between a snake and a lizard?
Some key differences between snakes and lizards are: Limbs: Snakes lack limbs, while lizards typically have four limbs. Eyelids: Lizards have movable eyelids, whereas many snakes have a transparent scale covering their eyes. Body shape: Snakes have elongated bodies, while lizards have a more compact body shape.
What does anatomical structures mean in a scientific term?
Anatomical structures refer to the parts and components that make up an organism's body, such as organs, tissues, and bones. Understanding these structures helps researchers study the function and organization of living organisms.
Are tails limbs?
Tails are not considered limbs; they are distinct appendages that serve different functions. Limbs, such as arms and legs, are typically used for movement and manipulation, while tails primarily assist with balance, communication, and sometimes locomotion in certain animals. Tails are composed of vertebrae and muscle, whereas limbs are structured differently, involving joints and a variety of bones. Thus, while both are appendages, they have different anatomical and functional characteristics.
How homologous structure that does not involve the limbs of vertebrates?
Homologous structures are anatomical features in different species that share a common ancestry, even if they serve different functions. An example outside of vertebrate limbs is the similarity in the skull structure of various mammals, such as humans, cats, and whales. Despite their different functions—like biting, vocalization, or echolocation—these skulls exhibit similar bone arrangements, reflecting their evolutionary relationships. This demonstrates how evolutionary processes can lead to diverse adaptations from a common structural blueprint.
How many legs does a oxen have?
An ox has four legs. Like all cattle, they are quadrupeds, meaning they walk on four limbs. This anatomical structure is typical for members of the bovine family.
Why can Asians crouch with feet flat and Europeans cant?
The ability to crouch with flat feet can be attributed to differences in anatomy, flexibility, and cultural practices. Many Asians grow up in environments where sitting and squatting on the ground are common, promoting greater flexibility in the hips, knees, and ankles. In contrast, many Europeans may have less exposure to these practices, leading to tighter muscles and joints. Additionally, genetic factors may play a role in the structural differences of feet and lower limbs between populations.
Divides into vertebral axillary?
The term "vertebral axillary" typically refers to the anatomical regions associated with the vertebral column and the axillary (armpit) area. These regions are significant in the context of the body's structural and functional organization, particularly in the central nervous system and the circulatory system. The vertebral region houses the spinal cord, while the axillary region contains important blood vessels and nerves that supply the upper limbs. Understanding the relationship between these areas is crucial in fields such as medicine and anatomy.
