Criteria used to name the muscle, transverse abdomis was
1. Direction of the muscle fibers
2. Relative size of the muscle to the muscles around it
3. Location of the muscle
4. Number of origins
5. Location of the muscle's origin and insertion
6. Shape of the muscle
7. Action of the muscle
Direction- Rectus abdominis Size- Gluteus Maximus Shape- Deltoid Action- Flexor Carpi Radialis Number of Origins- Biceps Brachii Location- Temporalis Origin and Insertion-sternocleidomastoid
Pectoralis major, deltoid, triceps brachii, coracobrachialis, serratus anterior, external and internal obliques, rectus abdominis and the transverse abdominis are all used in push ups. The pectoralis major and the triceps are the prime movers.
My butt-hole smells good with KY Jelly
A plank primarily engages the back, shoulder, and abdominal muscles. Most notably, these include the erector spinae, rectus abdominis, transverse abdominus, trapezius, pectorals, and deltoids.
The internal and external oblique abdominis, transverse abdominis, and the rectus abdominis on the anterior (front) part of the body. The posterior (or back) ones include the quadratus lumborum iliacus and psoas major and minor. Forced expiration muscles are used in coughing but also are important in singing.
Rectus abdominis.
Rectal Abdominis
Rectus Abdominis
The chemical nomenclature system is used in naming compounds.
I would say that the rectus abdominis would be the main muscle associated with trunk flexion, but the external and internal obliques also perform trunk flexion.
The Aztects used naming based on situation and the astronomy of the days.
Criteria is already a plural - it is used incorrectly as a singular. The singular is criterion.