Science Reviewer for Grade 4
SCIENCE Reviewer
SKELETAL SYSTEM consists of all the bones in the body give the body support and shape - for movement and protection 2 MAIN PARTS:
1. AXIAL skeleton- bones in the HEAD and TRUNK - SUPPORT and PROTECTION SKULL : helmet-like case that protects the brain called CRANIUM * The BRAIN is the control center of the body. BACKBONE or SPINE: 26 irregularly-shaped bones called VERTEBRAE Each vertebra forms a ring. All the rings together form a hollow tube which ENCLOSES the SPINAL CORD. The curve in the lower part helps the body have an erect posture. STERNUM or BREASTBONE: long ,narrow , flatbone found at the middle of the chest ,attached to a cage of flat,curved bones called RIBS RIBS: encloses the heart and lungs ; 24 ribs in all 2. APPENDICULAR SKELETON: made up 126 bones SCAPULA or shoulder blade: flat and triangular CLAVICLES or collar bones: joins the shoulder blade ARM BONES: upper arm and lower arm (FOREARM) HIPBONE: bone just below the waist; forms a ring called the PELVIS. The pelvis surrounds some abdominal organs
LEG BONES: attached to the hip bone FEMUR – longest bone in the body KNEE BONE- bone between the upper and lower legs
*Altogether, there are 206 bones in the human adult. BONES make up the skeleton which is the framework of the body.
*The ear bones are the smallest bones in the body.
SKELETON: consists of all the bones in the body
AXIAL SKELETON: made up of the skull,breastbone,backbone and ribs SKULL : set of bones that protects the brain and eyes.CRANIUM- helmet like case of the skull that protects the brain BREAST BONE or STERNUM: bone where the ribs are attached BACK BONE or SPINAL COLUMN: set of bones stacked on top of one another to form a tube
SKELETAL SYSTEM consists of all the bones in the body give the body support and shape - for movement and protection 2 MAIN PARTS:
1. AXIAL skeleton- bones in the HEAD and TRUNK - SUPPORT and PROTECTION SKULL : helmet-like case that protects the brain called CRANIUM * The BRAIN is the control center of the body. BACKBONE or SPINE: 26 irregularly-shaped bones called VERTEBRAE Each vertebra forms a ring. All the rings together form a hollow tube which ENCLOSES the SPINAL CORD. The curve in the lower part helps the body have an erect posture. STERNUM or BREASTBONE: long ,narrow , flatbone found at the middle of the chest ,attached to a cage of flat,curved bones called RIBS RIBS: encloses the heart and lungs ; 24 ribs in all 2. APPENDICULAR SKELETON: made up 126 bones SCAPULA or shoulder blade: flat and triangular CLAVICLES or collar bones: joins the shoulder blade ARM BONES: upper arm and lower arm (FOREARM) HIPBONE: bone just below the waist; forms a ring called the PELVIS. The pelvis surrounds some abdominal organs
LEG BONES: attached to the hip bone FEMUR – longest bone in the body KNEE BONE- bone between the upper and lower legs
*Altogether, there are 206 bones in the human adult. BONES make up the skeleton which is the framework of the body.
*The ear bones are the smallest bones in the body.
SKELETON: consists of all the bones in the body
AXIAL SKELETON: made up of the skull,breastbone,backbone and ribs SKULL : set of bones that protects the brain and eyes.CRANIUM- helmet like case of the skull that protects the brain BREAST BONE or STERNUM: bone where the ribs are attached BACK BONE or SPINAL COLUMN: set of bones stacked on top of one another to form a tube