These fill-in-the-blank answers are based on NCERT Biology Class 11 content from the Locomotion and Movement chapter. (a) All mammals typically have 7 cervical vertebrae, regardless of neck length (giraffe or whale). (b) Each human limb has 14 phalanges - the thumb has 2 while other fingers have 3 each (2+3+3+3+3=14). (c) The thin filament contains 2 F-actins along with Tropomyosin and Troponin proteins - Tropomyosin is mentioned in the matching exercise as part of thin filament. (d) Calcium ions are stored in the sarcoplasmic reticulum of muscle fibres and released during muscle contraction. (e) The 11th and 12th pairs of ribs are called floating ribs as they are not connected to the sternum. (f) The human cranium (brain box) is made of 8 bones.