Activity 7.1 Classifying Bones According to Shape We can classify bones accordin

Question

Activity 7.1 Classifying Bones According to Shape We can classify bones according to their size and shape. Study a whole skeleton, or a complete collection of disarticulated bones, and notice the wide range of sizes and forms. ldentify the bones according to the following shapess (a) Sutural bones Word Origins Sutural bones develop between the The word sesamoid derives from the Greek word sesamoeides, which means "like a sesame." Most sesamoid bones are small and roughly resemble the shape of a sesame seed. The patella resembles a small plate or shallow disk, which is what the term patella means in Latin. (sutures) of cranial bones Figure [a). Their number varies between individuals. Sutural (b) Flat bone Flat bones are thin, platelike structures. This group includes the cranial bones the brain such as the parietal bone, Figure [bD, the sternum, the ribs, and the scapulae. that protect Long bones have extended of the bone is much greater than the width. A typical long bone contains an elongated shaft, known as the diaphysis, with two expanded, knoblike ends or epiphyses. Examples of long bones include the bones in the arm (humerus, Figure MAKING CONNECTIONS (c) Long bone I axes so that the length The metacarpal bones (in the palms), metatarsal bones (in the soles), and phalanges (in the fingers and toes) are much shorter than most ribs, and yet the bones in the hands and feet are classified as long bones and the ribs as flat bones. Why do you think these bones are classified as they are? D, forearm (radius and ulna), thigh femur), and leg (tibla and fibula). Humerus Irregular bones have a variety of shapes and include the facial bones (d) Irregular bone of the skull, the vertebrae (Figure dD, and the pelvic bones Sesamoid bones are embedded in tendons at articulations. The patella (kneecap, Fisure leD is a sesamoid bone found in all humans. The number of varies among individuals (e) Sesamoid other sesamoid bones bone Short bones are those in which the length and width are about equal, so they appear cube shaped. They include the bones of the wrist Pat ella ort bones carpal bones, Figure [f) and ankle (tarsal bones) EXERCISE 7 Intiodurtion

Explanation / Answer

Answer

The metacarpal bones, metatarsal bones and phalanges are shorter than ribs and they have length and width approximately similar so they are considered short bones. They have cuboidal appearance.

The bones in hands and feet are considered as long because they has extended longitudinal axis and greater length than width. These bones have rounded shape. They have long shaft and two rounded end called epiphyses.

Ribs are considered as flat bones because, they have flat shape and not the rounded one. They are thin and platelike bones in apperance. Flat bones usually have the function for protectiong of organs and they also provide broad site for muscular attachment. Ribs has broad area and protects the organs in thoracic cavity.

Hence, these bones are classified as they are.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.