GENERAL HISTOLOGY

Detailed explanation-1: -Sometimes, included in the parallel muscle group, these muscles are more spindle-shaped, with the muscle belly being wider than the origin and insertion. Examples are, Biceps Brachii and Psoas major.

Detailed explanation-2: -As mentioned earlier, fusiform muscles have parallel fibers that run the length of the muscle and narrow at each end, forming a spindle shape. The tendons that attach fusiform muscles to bones are restricted to the ends of the muscle. The thickest part of the muscle is usually near its middle.

Detailed explanation-3: -Pennate muscles tend to generate considerable power. Fusiform muscle fibers run parallel to a muscle’s long axis. In this case, fiber length equals muscle length, and a fiber’s force generation transmits directly to the tendon. This arrangement facilitates rapid muscle shortening.

Detailed explanation-4: –Smooth muscle cells are fusiform in shape meaning that they are wide in the middle with tapered ends, they also have only a single nucleus.-Smooth muscle cells are non striated because there is no regular arrangement of actin and myosin filaments. They are involuntary muscles.

Detailed explanation-5: -Some parallel muscles are flat sheets that expand at the ends to make broad attachments such as the sartorius (see Figure 11.2. 2). Other parallel muscles have a larger central region called a muscle belly tapering to tendons on each end. This arrangement is called fusiform such as the biceps brachii (see Figure 11.2.