Trapezius
The root word for "triangularly" is "triangle," which refers to a three-sided polygon.
Smooth muscle cell are spindle-shaped.
Calf
What is the dome-shaped sheet of muscle that forms the bottom of the chest cavity?The dome-shaped sheet of muscle that forms the bottom of the chest cavity is called Diaphragm.
They are spindle shaped and nonstriated with a single, central nucleus.
Plucking means using a plectra, commonly known as a pick, in order to pluck the strings. It is usually a small triangularly shaped piece of plastic used for a generally louder volume than just fingers.
If it is spindle shaped, it is smooth (visceral) muscle tissue. If it is H or Y-shaped then it is cardiac muscle tissue. And, if it is rod shaped and has multiple nuclei, then it is skeletal muscle tissue. Another characteristic of both cardiac and muscle tissue is that it is striated with darker and lighter bands.
Smooth muscle cell are spindle-shaped.
deltoid
The dome shaped muscle that works with the lungs is the diaphragm.
The deltoid covers the shoulder. This triangular-shaped muscle lifts the arm or turns it.
Diaphragm.