Sys´to-le. [Gr. συστελλω, sūstellō, to contract.] The contraction of the heart and arteries for expelling the blood and carrying on the circulation.

Tar´sal. Relating to the tarsus.

Tar´sus. [L.] The posterior part of the foot.

Ten´don. [Gr. τεινω, teino, to stretch.] A hard, insensible cord, or bundle of fibres, by which a muscle is attached to a bone.

Ten´di-na, -æ. Pertaining to a tendon.

Tens´or. A muscle that extends a part.

Ten-tac´u-la, -æ. [L. tento, to seize.] A filiform process or organ on the bodies of various animals.

Ten-to´ri-um. [L. tendo, to stretch.] A process of the dura mater which lies between the cerebrum and cerebellum.

Te´res. [L. teres, round.] An epithet given to many organs, the fibres of which are collected in small bundles.

Tho´rax. [Gr.] That part of the skeleton that composes the bones of the chest. The cavity of the chest.