Twenty-five (25) mature albino Wistar rats weighing between 175g-200g were divided into five groups of five rats each, based on
their body weights. Group A served as the control and received normal feed and clean tap water orally for 7 days. Group B animals
received 2.5ml/kg body weight of carbon tetrachloride (CCl4) on the first day of administration only. Group C animals were
administered with 2.5ml/kg body weight of carbon tetrachloride (CCl4) on the first day of administration and 100mg/kg body weight
of the bark (peel) of ripe carica papaya extract dissolved in 2ml of distilled water orally, once for 7 days. Group D received 2.5ml/kg
body weight of CCL4 on the first day of administration and 200mg/kg body weight of extract dissolved in 2ml of distilled water
orally, once daily for 7 days. Group E received 2.5ml/kg of carbon tetrachloride (CCl4) on the first day of administration and 300mg/kg body weight of extract dissolved in 2ml of distilled water orally, once daily for 7 days. The animals were sacrificed on the
8th day, the liver removed and processed for Haematoxylin and Eosin staining. Histological results revealed irreversible area of
chronic inflammation, sinusoidal enlargement, vascular degeneration, vascular congestion and cellular proliferation with pyknotic
nucleus in the treated groups when compared with the control group with normal cellular architecture. This reveals that bark peel of
ripe Carica papaya fruit exerted little or no hepatoprotective impact on the liver of rats administered with CCl4.
Keywords: Liver, carbon tetrachloride (CCl4), Carica papaya