Write the differences between :(a) Actin and Myosin(b) Red and White Muscles(c) Pectoral and Pelvic Girdle.

 
 
(a)
ActinMyosin
1. The light band in the myofibril contain actin protein The dark band in the myofibril contain myosin protein
2. Actin filaments are thin Myosin filaments are thick.
(b)
Red Muscles White Muscles
1. Muscles which contain high amount of oxygen storing red colour pigment called myoglobin appear red. White muscles do not contain myoglobin. So they are white in colour.
2. They contain plenty of Mitochondria. The number of mitochondria is few.
3. These are aerobic muscles. They depend on anaerobic process for energy.
(c)
Pectoral Girdle Pelvic Girdle
1. The pectoral girdle helps in the articulation of the upper limbs. The pelvic girdle helps in the articulation of the lower limbs.
2. The pectoral girdle consists of a clavicle and a scapula. The pelvic girdle consists of two coxal bones.
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