Answer:
The lambdoidal suture is found between <u>parietal and occipital bones.</u>
Explanation:
Sutures are fibrous joints. Joint is a structure that provides connections between two or more bones or rigid parts of skeleton. Joints are classified on on the type of substance which provides connection. The types are as follows:
1- Synovial Joints
Joints are connnected by a joint capsule made of fibrous later outside lined inside by a synovial membrane.
They are the most common type of joint and allow free movement.
Examples: Hip joint, Elbow joint, Knee Joint
2- Fibrous Joints
Joints are connected by fibrous tissue. <u>Sutures belong to this category of joints in which skull bones are unites by fibrous membranes.</u>
3- Cartilagenous Joints
Joints are connected by cartilage.
Example: Intervertebral discs in spine.
SUTURES:
Sutures are fibrous joints in the skull. They connect different bones of the skull. They interlock the bones along a wavy line.
Human skull consists of 8 bones. They are
1- Frontal
2- Ethmoidal
3- Sphenoidal
4- Occipital
5- Two sets of Parietal Bones
6- Two sets of Temporal Bones
CORONAL SUTURE:
Separates frontal and two parietal bones.
SAGITTAL SUTURE:
Separates the two parietal bones
LAMBDOIAL SUTURE (ALSO KNOWN AS LAMDOID SUTURE)
Separates the occipital bone and two parietal bones.
SPHENOFRONTAL SUTURE:
Separates the sphenoid and frontal bones.
Hence if we come back to the question,
- The suture between frontal and parietal bones is coronal suture.
- The is no suture between ethmoid and temporal bones as they do not articulate or unite.
- <u>The suture between parietal and occipital bones is Lamdoidal suture and is the correct answer.</u>
- The suture between frontal and sphenoid bones is Sphenofrontal suture.
