Thread like tendons of papillary muscles inserted upon the A-V valves are :-
(a.) Chordae tendinae
(b.)Yellow elastin fibres
(c.) Reticulate fibres
(d.) Collagen fibres

The thread like tendons of papillary nuscles inserted upon the flaps of tricuspid and bicuspid valves are

Tricuspid and bicuspid valves are connected to the papillary muscles of the ventricles by (A) Ligamentum arteriosum (B) Columnae carneae (C) Pectinate muscles (D) Chordae tendinae

Indicate whether the following statements are true of false : (a) Both auricles of amphibian heart open into the same ventricle. (b) Prawn's heart carries only oxygenated blood. (c ) Purkinje fibres are nerve fibres supplying the ventricular muscles. (d) The first heart sound results from a closure of semilunar valves. (e ) The vagus nerve reduces the heart rate. (f) The A-V node normally initiates the cardiac impulse. (g) Semilunar valves open during the ventricular diastole.

Given below are four statement (i) - (iv) each with two blanks. Select the option which correctly fills up the blanks in any two of these statements (i) The columnar epithelium is composed of ul(1) and slender cells. Their ul(2) are located at the base (ii) Collagen fibres provide ul(3) and elastin fibres provide ul(4) and elasticity to the tissue (iii) Adipose tissue is a ul(5) type of connective tissue located mainly beneath ul(6) (iv) Tendons attach ul(7) to bones and ligaments attach ul(8) to bones.

Go through the following statements (i) The inner surface of atria have got transverse muscular ridges called papillary muscles. (ii) Chordae tendinae are special fibrous cords attached to the AV valves and prevent them from collapsing back into the atria during powerful vantricular contraction (iii) The neurogenic heart stops functioning immidiately after removal from the body. (iv) The conduction of cardiac impulse is slowest in the A.V. node. Which of these are correct ?

The free edges of cuspid valves are attached to the papillary muscles of the heart by fibres are called ___________.

Read statements "A" and "B" and select the correct option. A : Cells of all connective tissues secrete fibres of structural proteins called collagen or elastin. B : In tendons, the collagen fibres are present in rows between many parallel bundles of fibres. Only statement A is correct Both statements are correct

Read the following statements and select the correct option (A) Blood cells serete fibres of structural proteins called collagen or elastin (B) Neuoglial cells protect and support the nephrons (C) Osteocytes are present in spaces called lacunae (D) Striated muscle fibres are bundled together in a parallel fastion (E) Bieps are involuntary and striated.

Choose the correct statements with reference to hyaline cartilage (a) It is bluish white translucent and glass like cartilage (b) Matrix shows collagen fibres and elastin fibres (c) It forms embryonic endoskeleton in cyclostomes and adult cartilage fishes (d) It is the strongest cartilage with perichondrium.

How many out of the following feature(s) is/are common between skeletal and cardiac muscle fibres? (a) Presence of 'T-tubules (b) Number of nuclei per fibre (c) Intercalated discs (d) Presence of striations (e) Cylindrical shape of fibres (f) Only aerobic contractions