Question

Dense irregular connective tissue is found in
(a) Periosteum and pericardium
(b) Vocal cords and trachea
(c) Bone marrow and lymph nodes
(d) Tendon and ligaments

Answer 1

Hint: Organs that help in the passage of air and to produce sound are made by bundles of collagen fibers that are arranged irregularly,

Complete answer:
If the bundle of collagen fibers is irregularly arranged in the connective tissue, it is called dense irregular connective tissue. Pericardium, endosteum, periosteum, heart valves, joint capsules, and deep regions of the dermis of the skin contain or are made up of dense irregular connective tissue.

Additional Information: - Widely distributed and abundant tissue in the body of higher animals is called connective tissue. Because of their special function of binding and supporting other tissues in the body, they are named connective tissues.
- It contains cells and a large extracellular matrix and it is mesodermal in origin
- Connective tissue is of three types namely connective tissue proper, skeletal tissue, and fluid connective tissue
- Connective tissue proper is further classified into two types namely loose connective tissue and dense connective tissue. Adipose tissue, areolar tissue, and reticular tissue are the types of loose connective tissue and dense regular connective tissue, dense irregular connective tissue, and elastic connective tissue are the types of dense connective tissue.
- Skeletal tissue is of two types namely cartilage and osseous tissue. Fluid connective or vascular connective tissue includes blood.
So, the correct answer is ‘periosteum and pericardium’

Note: -Hyaline cartilage, elastic cartilage, and fibrous cartilage are the three types of cartilage.
-Dense regular connective tissue is found in Tendons and ligaments. Trachea, vocal cords, bronchi, and elastic ligaments consist of elastic connective tissue.