Anatomy

The structure of the lungs of the goat is illustrated in Figure 9.1. The lung is divided into bilateral cranial lobes (each with a cranial and a caudal part), a middle (cardiac) lobe on the right side, an accessory lobe of the right lung that extends ventrally on the midline, and bilateral caudal (diaphragmatic) lobes (Constantinescu 2001). The right cranial lobe is supplied by a separate tracheal bronchus that originates before the bifurcation of the trachea. This lobe wraps around anterior to the heart and actually reaches the left side of the thorax. Subpleural lymph nodes 1-30 mm in diameter have been reported in the lungs of Angora and feral goats in New Zealand (Valero et al. 1993).