The arrows in B and C point to structures that can both be described as . Features of joints found in the skull, distal bones, and teeth. The arrows in B and C point to structures that can both be described as . ligaments tendons bones muscles

Complete question:Find the structure in the attached file below.

The arrows in B and C point to structures that can both be described as LIGAMENTS.

Explanation:

The endoskeleton consist of numerous units of bones jointed at appropriate points. The place where two or more bones are jointed is called a JOINT. There are different types of joints and they include:

-immovable or fixed joints: these joints have saw- like edges which interlock to form sutures at the joints. They are found among the bones of the skull.

- gliding joints: they permit a slight or gliding movement and the bones are held together by discs of fibro- cartilage materials. An example is the joints of the tooth.fibrous connection between a tooth and its socket is a PERIODONTAL LIGAMENT.

- Ball And Socket Joints: this is seen in the shoulder and distal bones.

The following are found in a typical joint section:

- cartilage

- bone ends

- ligaments ( these are strong Fibrous connective tissues that holds two bone ends firmly together in a joint).

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

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