In which part or organ of human body cartilage is NOT found?
- (a)Nose
- (b)Trachea
- (c)Bronchiole
- (d)Knee joint
Correct — C, Bronchiole. Cartilage is present in the nose, larynx, trachea and bronchi (which have C-shaped rings or plates of cartilage to hold the airway open) and on the articular surfaces of joints such as the knee. As the airways branch down into the small bronchioles, cartilage disappears — bronchiole walls are supported by smooth muscle and elastic tissue, not cartilage. So cartilage is NOT found in the bronchiole.
- (a)Nose — The nose contains cartilage — the flexible framework of the nasal tip and septum is cartilaginous, so cartilage IS found here.
- (b)Trachea — The trachea (windpipe) is held open by C-shaped rings of hyaline cartilage, so cartilage IS present here.
- (d)Knee joint — The knee has articular (hyaline) cartilage on the bone ends plus the fibrocartilage menisci, so cartilage IS found in the knee joint.
Cartilage is a firm but flexible connective tissue that supports and cushions. In the respiratory tract the larger airways (trachea and bronchi) carry cartilage rings/plates to stay open; the transition to bronchioles is defined precisely by the LOSS of cartilage — bronchioles rely on smooth muscle instead. Cartilage also lines movable joints and forms the nose and external ear.
Scan each site for cartilage. Nose (structural cartilage), trachea (C-rings) and knee (articular cartilage) all clearly contain it. The distinguishing textbook fact is that bronchioles — unlike bronchi — have no cartilage. That makes (c) the correct 'NOT found' answer.
- Trachea and bronchi contain cartilage (C-shaped rings / plates) to keep the airway open.
- Bronchioles have NO cartilage — their walls are smooth muscle and elastic fibres; this is what distinguishes a bronchiole from a bronchus.
- The nose and external ear are supported by cartilage; joints such as the knee have articular (hyaline) cartilage and menisci.
- Cartilage is an avascular connective tissue made by chondrocytes; its three types are hyaline, elastic and fibrocartilage.
Cartilage is absent only in the bronchiole.
- Assuming all airways have cartilage — bronchioles do not; that is their defining feature.
- Confusing cartilage (nose, joint cushioning) with ligaments/tendons.
Asked as 'where is cartilage NOT found' or by testing the bronchus-versus-bronchiole distinction and the types of cartilage.
No directly related past PYQ was found.
- practice — not a real PYQ
The trachea is prevented from collapsing by rings of:
- (a)Bone
- (b)Hyaline cartilage
- (c)Smooth muscle
- (d)Ligament
Answer(b) Hyaline cartilage — C-shaped rings keep the trachea open.
- practice — not a real PYQ
Which connective tissue connects one bone to another at a joint?
- (a)Tendon
- (b)Ligament
- (c)Cartilage
- (d)Areolar tissue
Answer(b) Ligament — it joins bone to bone (tendons join muscle to bone).