Fifth Grade Science: Bones and The Skeletal System


Fifth Grade Science: Bones and The Skeletal System
This is one of the science topics I learned in grade five. Your bones are made out of minerals called calcium. Your bones have four main jobs: One, it holds up your body and gives you structure. Two, it helps you move around. Three, the inside of your bone produces blood cells, and four it protects your organs. Humans are originally born with 300 bones but then ends up with 206 bones at the age of 25. Why do we lose so much bones? Well, the 300 bones you started with fuses up together to make one big bone. Your skeleton is organized into two parts. The axial and appendicular. The axial bones of your body give your body shape and structure such as your ribs. The appendicular bones are the bones that help you move, like your kneecap.
This lists 22 bones in their scientific name.
Skull: Cranium
Upper jaw: Maxilla
Lower jaw: Mandible
Spine: Vertebral column (or spinal cord)
Main forearm: Radius
Lesser forearm: Ulna
Collarbone: Clavicle
Shoulder blade: Scapula
Breast bone: Sternum
Upper arm: Humerus (Ha-ha so funny)
Hip bone: Pelvis
Upper leg: Femur (The biggest bone in your body’s history!)
Kneecap: Patella
Shin: Tibia
Calf: Fibula
Wrist: Carpals
Hand: Metacarpals
Ankle: Tarsals
Foot: Metatarsals
Fingers and toes: Phalanges
Ribs: Ribs or Rib Cage
Cheekbone: Zygoma
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